DELPHI基础开发技巧

◇[DELPHI]网络邻居复制文件 uses shellapi; copyfile(pchar('newfile.txt'),pchar('//computername/direction/targer.txt'),false); ◇[DELPHI]产生鼠标拖动效果 通过MouseMove事件、DragOver事件、EndDrag事件实现，例如在PANEL上的LABEL： var xpanel,ypanel,xlabel,ylabel:integer; PANEL的MouseMove事件：xpanel:=x;ypanel:=y; PANEL的DragOver事件：xpanel:=x;ypanel:=y; LABEL的MouseMove事件：xlabel:=x;ylabel:=y; LABEL的EndDrag事件：label.left:=xpanel-xlabel;label.top:=ypanel-ylabel; ◇[DELPHI]取得WINDOWS目录 uses shellapi; var windir:array[0..255] of char; getwindowsdirectory(windir,sizeof(windir)); 或者从注册表中读取，位置： HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion SystemRoot键，取得如：C:/WINDOWS ◇[DELPHI]在form或其他容器上画线 var x,y:array [0..50] of integer; canvas.pen.color:=clred; canvas.pen.style:=psDash; form1.canvas.moveto(trunc(x[i]),trunc(y[i])); form1.canvas.lineto(trunc(x[j]),trunc(y[j])); ◇[DELPHI]字符串列表使用 var tips:tstringlist; tips:=tstringlist.create; tips.loadfromfile('filename.txt'); edit1.text:=tips[0]; tips.add('last line addition string'); tips.insert(1,'insert string at NO 2 line'); tips.savetofile('newfile.txt'); tips.free; ◇[DELPHI]简单的剪贴板操作 richedit1.selectall; richedit1.copytoclipboard; richedit1.cuttoclipboard; edit1.pastefromclipboard; ◇[DELPHI]关于文件、目录操作 Chdir('c:/abcdir');转到目录 Mkdir('dirname');建立目录 Rmdir('dirname');删除目录 GetCurrentDir;//取当前目录名，无'/' Getdir(0,s);//取工作目录名s:='c:/abcdir'; Deletfile('abc.txt');//删除文件 Renamefile('old.txt','new.txt');//文件更名 ExtractFilename(filelistbox1.filename);//取文件名 ExtractFileExt(filelistbox1.filename);//取文件后缀 ◇[DELPHI]处理文件属性 attr:=filegetattr(filelistbox1.filename); if (attr and faReadonly)=faReadonly then ... //只读 if (attr and faSysfile)=faSysfile then ... //系统 if (attr and faArchive)=faArchive then ... //存档 if (attr and faHidden)=faHidden then ... //隐藏 ◇[DELPHI]执行程序外文件 WINEXEC//调用可执行文件 winexec('command.com /c copy *.* c:/',SW_Normal); winexec('start abc.txt'); ShellExecute或ShellExecuteEx//启动文件关联程序 function executefile(const filename,params,defaultDir:string;showCmd:integer):THandle; ExecuteFile('C:/abc/a.txt','x.abc','c:/abc/',0); ExecuteFile('http://tingweb.yeah.net','','',0); ExecuteFile('mailto:[email protected]','','',0); ◇[DELPHI]取得系统运行的进程名 var hCurrentWindow:HWnd;szText:array[0..254] of char; begin hCurrentWindow:=Getwindow(handle,GW_HWndFrist); while hCurrentWindow <> 0 do begin if Getwindowtext(hcurrnetwindow,@sztext,255)>0 then listbox1.items.add(strpas(@sztext)); hCurrentWindow:=Getwindow(hCurrentwindow,GW_HWndNext); end; end; ◇[DELPHI]关于汇编的嵌入 Asm End; 可以任意修改EAX、ECX、EDX；不能修改ESI、EDI、ESP、EBP、EBX。 ◇[DELPHI]关于类型转换函数 FloatToStr//浮点转字符串 FloatToStrF//带格式的浮点转字符串 IntToHex//整数转16进制 TimeToStr DateToStr DateTimeToStr FmtStr//按指定格式输出字符串 formatDateTime('YYYY-MM-DD,hh-mm-ss',DATE); ◇[DELPHI]字符串的过程和函数 Insert(obj,target,pos);//字符串target插入在pos的位置。如插入结果大于target最大长度，多出字符将被截掉。如Pos在255以外，会产生运行错。例如，st:='Brian'，则Insert（'OK',st,2）会使st变为'BrOKian'。 Delete(st,pos,Num);//从st串中的pos（整型）位置开始删去个数为Num（整型）个字符的子字串。例如，st:='Brian'，则Delete(st,3,2)将变为Brn。 Str(value,st);//将数值value（整型或实型）转换成字符串放在st中。例如，a=2.5E4时，则str(a:10,st)将使st的值为' 25000'。 Val(st,var,code);//把字符串表达式st转换为对应整型或实型数值，存放在var中。St必须是一个表示数值的字符串，并符合数值常数的规则。在转换过程中，如果没有检测出错误，变量code置为0，否则置为第一个出错字符的位置。例如，st:=25.4E3,x是一个实型变量，则val(st,x,code)将使X值为25400，code值为0。 Copy(st.pos.num);//返回st串中一个位置pos（整型）处开始的，含有num（整型）个字符的子串。如果pos大于st字符串的长度，那就会返回一个空串，如果pos在255以外，会引起运行错误。例如，st:='Brian'，则Copy(st,2,2)返回'ri'。 Concat(st1,st2,st3……,stn);//把所有自变量表示出的字符串按所给出的顺序连接起来，并返回连接后的值。如果结果的长度255，将产生运行错误。例如，st1:='Brian',st2:=' ',st3:='Wilfred'，则Concat(st1,st2,st3)返回'Brian Wilfred'。 Length(st);//返回字符串表达式st的长度。例如，st:='Brian'，则Length(st)返回值为5。 Pos(obj,target);//返回字符串obj在目标字符串target的第一次出现的位置，如果target没有匹配的串，Pos函数的返回值为0。例如，target:='Brian Wilfred'，则Pos('Wil',target)的返回值是7，Pos('hurbet',target)的返回值是0。 ◇[DELPHI]关于处理注册表 uses Registry; var reg:Tregistry; reg:=Tregistry.create; reg.rootkey:='HKey_Current_User'; reg.openkey('Control Panel/Desktop',false); reg.WriteString('Title Wallpaper','0'); reg.writeString('Wallpaper',filelistbox1.filename); reg.closereg; reg.free; ◇[DELPHI]关于键盘常量名 VK_BACK/VK_TAB/VK_RETURN/VK_SHIFT/VK_CONTROL/VK_MENU/VK_PAUSE/VK_ESCAPE /VK_SPACE/VK_LEFT/VK_RIGHT/VK_UP/VK_DOWN F1--F12：$70(112)--$7B(123) A-Z：$41(65)--$5A(90) 0-9：$30(48)--$39(57) ◇[DELPHI]初步判断程序母语 DELPHI软件的DOS提示：This Program Must Be Run Under Win32. VC++软件的DOS提示：This Program Cannot Be Run In DOS Mode. ◇[DELPHI]操作Cookie response.cookies("name").domain:='http://www.086net.com'; with response.cookies.add do begin name:='username'; value:='username'; end ◇[DELPHI]增加到文档菜单连接 uses shellapi,shlOBJ; shAddToRecentDocs(shArd_path,pchar(filepath));//增加连接 shAddToRecentDocs(shArd_path,nil);//清空 ◇[杂类]备份智能ABC输入法词库 windows/system/user.rem windows/system/tmmr.rem ◇[DELPHI]判断鼠标按键 if GetAsyncKeyState(VK_LButton)<>0 then ... //左键 if GetAsyncKeyState(VK_MButton)<>0 then ... //中键 if GetAsyncKeyState(VK_RButton)<>0 then ... //右键 ◇[DELPHI]设置窗体的最大显示 onformCreate事件 self.width:=screen.width; self.height:=screen.height; ◇[DELPHI]按键接受消息 OnCreate事件中处理：Application.OnMessage:=MyOnMessage; procedure Tform1.MyOnMessage(var MSG:TMSG;var Handle:Boolean); begin if msg.message=256 then ... //ANY键 if msg.message=112 then ... //F1 if msg.message=113 then ... //F2 end; ◇[杂类]隐藏共享文件夹 共享效果：可访问，但不可见（在资源管理、网络邻居中） 取共享名为：direction$ 访问：//computer/dirction/ ◇[Java Script]Java Script网页常用效果 网页60秒定时关闭 关闭窗口 关闭 定时转URL 设为首页 设为首页 收藏本站 收藏本站 加入频道 加入频道 ◇[DELPHI]随机产生文本色 randomize;//随机种子 memo1.font.color:=rgb(random(255),random(255),random(255)); ◇[DELPHI]DELPHI5 UPDATE升级补丁序列号 1000003185 90X25fx0 ◇[DELPHI]文件名的非法字符过滤 for i:=1 to length(s) do if s[i] in ['/','/',':','*','?','<','>','|'] then ◇[DELPHI]转换函数的定义及说明 datetimetofiledate (datetime:Tdatetime):longint; 将Tdatetime格式的日期时间值转换成DOS格式的日期时间值 datetimetostr (datetime:Tdatetime):string; 将Tdatatime格式变量转换成字符串，如果datetime参数不包含日期值，返回字符串日期显示成为00/00/00，如果datetime参数中没有时间值，返回字符串中的时间部分显示成为00：00：00 AM datetimetostring (var result string; const format:string; datetime:Tdatetime); 根据给定的格式字符串转换时间和日期值，result为结果字符串，format为转换格式字符串，datetime为日期时间值 datetostr (date:Tdatetime) 使用shortdateformat全局变量定义的格式字符串将date参数转换成对应的字符串 floattodecimal (var result:Tfloatrec;value: extended;precision,decimals: integer); 将浮点数转换成十进制表示 floattostr (value:extended):string 将浮点数value转换成字符串格式，该转换使用普通数字格式，转换的有效位数为15位。 floattotext (buffer:pchar;value:extended; format:Tfloatformat;precision, digits:integer):integer; 用给定的格式、精度和小数将浮点值value转换成十进制表示形式，转换结果存放于buffer参数中，函数返回值为存储到buffer中的字符位数，buffer是非0结果的字符串缓冲区。 floattotextfmt (buffer:pchar;value:extended; format:pchar):integer 用给定的格式将浮点值value转换成十进制表示形式，转换结果存放于buffer参数中，函数返回值为存储到buffer中的字符位数。 inttohex (value:longint;digits:integer): string; 将给定的数值value转换成十六进制的字符串。参数digits给出转换结果字符串包含的数字位数。 inttostr (value:longint):string 将整数转换成十进制形式字符串 strtodate (const S:string):Tdatetime 将字符串转换成日期值，S必须包含一个合法的格式日期的字符串。 strtodatetime (const S:string):Tdatetime 将字符串S转换成日期时间格式，S必须具有MM/DD/YY HH：MM：SS[AM|PM]格式，其中日期和时间分隔符与系统时期时间常量设置相关。如果没有指定AM或PM信息，表示使用24小时制。 strtofloat (const S:string):extended; 将给定的字符串转换成浮点数，字符串具有如下格式： [+|-]nnn…[.]nnn…[<+|-><+|->nnnn] strtoint (const S:string):longint 将数字字符串转换成整数，字符串可以是十进制或十六进制格式，如果字符串不是一个合法的数字字符串，系统发生ECONVERTERROR异常 strtointdef (const S:string;default: longint):longint; 将字符串S转换成数字，如果不能将S转换成数字，strtointdef函数返回参数default的值。 strtotime (const S:string):Tdatetime 将字符串S转换成TDATETIME值，S具有HH：MM：SS[AM|PM]格式，实际的格式与系统的时间相关的全局变量有关。 timetostr (time:Tdatetime):string; 将参数TIME转换成字符串。转换结果字符串的格式与系统的时间相关常量的设置有关。 ◇[DELPHI]程序不出现在ALT+CTRL+DEL 在implementation后添加声明: function RegisterServiceProcess(dwProcessID, dwType: Integer): Integer; stdcall; external 'KERNEL32.DLL'; RegisterServiceProcess(GetCurrentProcessID, 1);//隐藏 RegisterServiceProcess(GetCurrentProcessID, 0);//显示 用ALT+DEL+CTRL看不见 ◇[DELPHI]程序不出现在任务栏 uses windows var Extendedstyle : Integer; begin Application.Initialize; //============================================================== Extendedstyle := GetWindowLong (Application.Handle, GWL_EXstyle); SetWindowLong(Application.Handle, GWL_EXstyle, Extendedstyle OR WS_EX_TOOLWINDOW AND NOT WS_EX_APPWINDOW); //=============================================================== Application.Createform(Tform1, form1); Application.Run; end. ◇[DELPHI]如何判断拨号网络是开还是关 if GetSystemMetrics(SM_NETWORK) AND $01 = $01 then showmessage('在线!') else showmessage('不在线!'); ◇[DELPHI]实现IP到域名的转换 function GetDomainName(Ip:string):string; var pH:PHostent; data:twsadata; ii:dword; begin WSAStartup($101, Data); ii:=inet_addr(pchar(ip)); pH:=gethostbyaddr(@ii,sizeof(ii),PF_INET); if (ph<>nil) then result:=pH.h_name else result:=''; WSACleanup; end; ◇[DELPHI]处理“右键菜单”方法 var reg: TRegistry; begin reg := TRegistry.Create; reg.RootKey:=HKEY_CLASSES_ROOT; reg.OpenKey('*/shell/check/command', true); reg.WriteString('', '"' + application.ExeName + '" "%1"'); reg.CloseKey; reg.OpenKey('*/shell/diary', false); reg.WriteString('', '操作(&C)'); reg.CloseKey; reg.Free; showmessage('DONE!'); end; ◇[DELPHI]发送虚拟键值ctrl V procedure sendpaste; begin keybd_event(VK_Control, MapVirtualKey(VK_Control, 0), 0, 0); keybd_event(ord('V'), MapVirtualKey(ord('V'), 0), 0, 0); keybd_event(ord('V'), MapVirtualKey(ord('V'), 0), KEYEVENTF_KEYUP, 0); keybd_event(VK_Control, MapVirtualKey(VK_Control, 0), KEYEVENTF_KEYUP, 0); end; ◇[DELPHI]当前的光驱的盘符 procedure getcdrom(var cd:char); var str:string; drivers:integer; driver:char; i,temp:integer; begin drivers:=getlogicaldrives; temp:=(1 and drivers); for i:=0 to 26 do begin if temp=1 then begin driver:=char(i+integer('a')); str:=driver+':'; if getdrivetype(pchar(str))=drive_cdrom then begin cd:=driver; exit; end; end; drivers:=(drivers shr 1); temp:=(1 and drivers); end; end; ◇[DELPHI]字符的加密与解密 function cryptstr(const s:string; stype: dword):string; var i: integer; fkey: integer; begin result:=''; case stype of 0: setpass; begin randomize; fkey := random($ff); for i:=1 to length(s) do result := result+chr( ord(s[i]) xor i xor fkey); result := result + char(fkey); end; 1: getpass begin fkey := ord(s[length(s)]); for i:=1 to length(s) - 1 do result := result+chr( ord(s[i]) xor i xor fkey); end; end; □◇[DELPHI]向其他应用程序发送模拟键 var h: THandle; begin h := FindWindow(nil, '应用程序标题'); PostMessage(h, WM_KEYDOWN, VK_F9, 0);//发送F9键 end; □◇[DELPHI]DELPHI 支持的DAO数据格式 td.Fields.Append(td.CreateField ('dbBoolean',dbBoolean,0)); td.Fields.Append(td.CreateField ('dbByte',dbByte,0)); td.Fields.Append(td.CreateField ('dbInteger',dbInteger,0)); td.Fields.Append(td.CreateField ('dbLong',dbLong,0)); td.Fields.Append(td.CreateField ('dbCurrency',dbCurrency,0)); td.Fields.Append(td.CreateField ('dbSingle',dbSingle,0)); td.Fields.Append(td.CreateField ('dbDouble',dbDouble,0)); td.Fields.Append(td.CreateField ('dbDate',dbDate,0)); td.Fields.Append(td.CreateField ('dbBinary',dbBinary,0)); td.Fields.Append(td.CreateField ('dbText',dbText,0)); td.Fields.Append(td.CreateField ('dbLongBinary',dbLongBinary,0)); td.Fields.Append(td.CreateField ('dbMemo',dbMemo,0)); td.Fields['ID'].Set_Attributes(dbAutoIncrField);//自增字段 □◇[DELPHI]DELPHI配置MS SQL 7和BDE步骤 第一步，配置ODBC： 先在ODBC 中设数据源，安装过SQL Server7.0 后,ODBC中有一项"系统DSN"应该有两项 数据源，一个是MQIS，一个是LocalSever，任选一个选后点击配置按钮，不知你的SQL7.0 是不是安装在本地机器上，如果是的话直接进行下一步，如果不是，在服务器一栏中填上 Server,然后进行下一步，填写登录ID 和密码（登录ID，和密码是在SQL7.0中的用户选项 中设的）。 第二步，配置BDE: 打开Delphi的BDE，然后点击MQIS 或 LocalServer，就会提示用户名和密码，这和 ODBC的用户名和密码是一样的，填上就行了。 第三步，配置程序： 如果用的是TTable，就在TTable的DatabaseName中选择MQIS 或LocalServer,然后在 TableName中选择Sale就行了，然后将Active改为True,Delphi弹出提示对话，填入用户 名和密码。 如果用的是TQuery,在TQuery上点击右键，再击"SQL Builder"，这是以界面方式配置 SQL语句，或者在TQuery的SQL中填入SQL语句。最后，别忘了将Active改为True。 在运行也可能配置TQuery,具体见Delphi帮助。 □◇[DELPHI]得到图像上某一点的RGB值 procedure Tform1.Image1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer); var red,green,blue:byte ; i:integer; begin i:= image1.Canvas.Pixels[x,y]; Blue:= GetBvalue(i); Green:= GetGvalue(i): Red:= GetRvalue(i); Label1.Caption:=inttostr(Red); Label2.Caption:=inttostr(Green); Label3.Caption:=inttostr(Blue); end; □◇[DELPHI]关于日期格式分解转换 var year,month,day:word;now2:Tdatatime; now2:=date(); decodedate(now2,year,month,day); lable1.Text :=inttostr(year)+'年'+inttostr(month)+'月'+inttostr(day)+'日'; ◇[DELPHI]如何判断当前网络连接方式 判断结果是MODEM、局域网或是代理服务器方式。 uses wininet; Function ConnectionKind :boolean; var flags: dword; begin Result := InternetGetConnectedState(@flags, 0); if Result then begin if (flags and INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM then begin showmessage('Modem'); end; if (flags and INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN then begin showmessage('LAN'); end; if (flags and INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY then begin showmessage('Proxy'); end; if (flags and INTERNET_CONNECTION_MODEM_BUSY)=INTERNET_CONNECTION_MODEM_BUSY then begin showmessage('Modem Busy'); end; end; end; ◇[DELPHI]如何判断字符串是否是有效EMAIL地址 function IsEMail(EMail: String): Boolean; var s: String;ETpos: Integer; begin ETpos:= pos('@', EMail); if ETpos > 1 then begin s:= copy(EMail,ETpos+1,Length(EMail)); if (pos('.', s) > 1) and (pos('.', s) < length(s)) then Result:= true else Result:= false; end else Result:= false; end; ◇[DELPHI]判断系统是否连接INTERNET 需要引入URL.DLL中的InetIsOffline函数。 函数申明为： function InetIsOffline(Flag: Integer): Boolean; stdcall; external 'URL.DLL'; 然后就可以调用函数判断系统是否连接到INTERNET if InetIsOffline(0) then ShowMessage('not connected!') else ShowMessage('connected!'); 该函数返回TRUE如果本地系统没有连接到INTERNET。 附： 大多数装有IE或OFFICE97的系统都有此DLL可供调用。 InetIsOffline BOOL InetIsOffline( DWORD dwFlags, ); ◇[DELPHI]简单地播放和暂停WAV文件 uses mmsystem; function PlayWav(const FileName: string): Boolean; begin Result := PlaySound(PChar(FileName), 0, SND_ASYNC); end; procedure StopWav; var buffer: array[0..2] of char; begin buffer[0] := #0; PlaySound(Buffer, 0, SND_PURGE); end; ◇[DELPHI]取机器BIOS信息 with Memo1.Lines do begin Add('MainBoardBiosName:'+^I+string(Pchar(Ptr($FE061)))); Add('MainBoardBiosCopyRight:'+^I+string(Pchar(Ptr($FE091)))); Add('MainBoardBiosDate:'+^I+string(Pchar(Ptr($FFFF5)))); Add('MainBoardBiosSerialNo:'+^I+string(Pchar(Ptr($FEC71)))); end; ◇[DELPHI]网络下载文件 uses UrlMon; function DownloadFile(Source, Dest: string): Boolean; begin try Result := UrlDownloadToFile(nil, PChar(source), PChar(Dest), 0, nil) = 0; except Result := False; end; end; if DownloadFile('http://www.borland.com/delphi6.zip, 'c:/kylix.zip') then ShowMessage('Download succesful') else ShowMessage('Download unsuccesful') ◇[DELPHI]解析服务器IP地址 uses winsock function IPAddrToName(IPAddr : String): String; var SockAddrIn: TSockAddrIn; HostEnt: PHostEnt; WSAData: TWSAData; begin WSAStartup($101, WSAData); SockAddrIn.sin_addr.s_addr:= inet_addr(PChar(IPAddr)); HostEnt:= gethostbyaddr(@SockAddrIn.sin_addr.S_addr, 4, AF_INET); if HostEnt<>nil then result:=StrPas(Hostent^.h_name) else result:=''; end; ◇[DELPHI]取得快捷方式中的连接 function ExeFromLink(const linkname: string): string; var FDir, FName, ExeName: PChar; z: integer; begin ExeName:= StrAlloc(MAX_PATH); FName:= StrAlloc(MAX_PATH); FDir:= StrAlloc(MAX_PATH); StrPCopy(FName, ExtractFileName(linkname)); StrPCopy(FDir, ExtractFilePath(linkname)); z:= FindExecutable(FName, FDir, ExeName); if z > 32 then Result:= StrPas(ExeName) else Result:= ''; StrDispose(FDir); StrDispose(FName); StrDispose(ExeName); end; ◇[DELPHI]控制TCombobox的自动完成 {'Sorted' property of the TCombobox to true } var lastKey: Word; //全局变量 //TCombobox的OnChange事件 procedure Tform1.AutoCompleteChange(Sender: TObject); var SearchStr: string; retVal: integer; begin SearchStr := (Sender as TCombobox).Text; if lastKey <> VK_BACK then // backspace: VK_BACK or $08 begin retVal := (Sender as TCombobox).Perform(CB_FINDSTRING, -1, LongInt(PChar(SearchStr))); if retVal > CB_Err then begin (Sender as TCombobox).ItemIndex := retVal; (Sender as TCombobox).SelStart := Length(SearchStr); (Sender as TCombobox).SelLength := (Length((Sender as TCombobox).Text) - Length(SearchStr)); end; // retVal > CB_Err end; // lastKey <> VK_BACK lastKey := 0; // reset lastKey end; //TCombobox的onKeyDown事件 procedure Tform1.AutoCompleteKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState); begin lastKey := Key; end; ◇[DELPHI]如何清空一个目录 function EmptyDirectory(TheDirectory :String ; Recursive : Boolean) : Boolean; var SearchRec : TSearchRec; Res : Integer; begin Result := False; TheDirectory := NormalDir(TheDirectory); Res := FindFirst(TheDirectory + '*.*', faAnyFile, SearchRec); try while Res = 0 do begin if (SearchRec.Name <> '.') and (SearchRec.Name <> '..') then begin if ((SearchRec.Attr and faDirectory) > 0) and Recursive then begin EmptyDirectory(TheDirectory + SearchRec.Name, True); RemoveDirectory(PChar(TheDirectory + SearchRec.Name)); end else begin DeleteFile(PChar(TheDirectory + SearchRec.Name)) end; end; Res := FindNext(SearchRec); end; Result := True; finally FindClose(SearchRec.FindHandle); end; end; ◇[DELPHI]安装程序如何添加到Uninstall列表 操作注册表，如下： 1.在HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall键下建立一个主键，名称任意。 例HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/MyUninstall 2.在HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/MyUnistall下键两个串值， 这两个串值的名称是特定的：DisplayName和UninstallString。 3.给串DisplayName赋值为显示在“删除应用程序列表”中的名称，如'Aiming Uninstall one'; 给串UninstallString赋值为执行的删除命令，如 C:/WIN97/uninst.exe -f"C:/TestPro/aimTest.isu" ◇[DELPHI]截获WM_QUERYENDSESSION关机消息 type Tform1 = class(Tform) procedure WMQueryEndSession(var Message: TWMQueryEndSession); message WM_QUERYENDSESSION; procedure CMEraseBkgnd(var Message:TWMEraseBkgnd);Message WM_ERASEBKGND; private { Private declarations } public { Public declarations } end; procedure Tform1.WMQueryEndSession(var Message: TWMQueryEndSession); begin Showmessage('computer is about to shut down'); end; ◇[DELPHI]获取网上邻居 procedure getnethood();//NT做服务器，WIN98上调试通过。 var a,i:integer; errcode:integer; netres:array[0..1023] of netresource; enumhandle:thandle; enumentries:dword; buffersize:dword; s:string; mylistitems:tlistitems; mylistitem:tlistitem; alldomain:tstrings; begin //listcomputer is a listview to list all computers;controlcenter is a form. alldomain:=tstringlist.Create ; with netres[0] do begin dwscope :=RESOURCE_GLOBALNET; dwtype :=RESOURCETYPE_ANY; dwdisplaytype :=RESOURCEDISPLAYTYPE_DOMAIN; dwusage :=RESOURCEUSAGE_CONTAINER; lplocalname :=nil; lpremotename :=nil; lpcomment :=nil; lpprovider :=nil; end; // 获取所有的域 errcode:=wnetopenenum(RESOURCE_GLOBALNET,RESOURCETYPE_ANY,RESOURCEUSAGE_CONTAINER,@netres[0],enumhandle); if errcode=NO_ERROR then begin enumentries:=1024; buffersize:=sizeof(netres); errcode:=wnetenumresource(enumhandle,enumentries,@netres[0],buffersize); end; a:=0; mylistitems :=controlcenter.lstcomputer.Items ; mylistitems.Clear ; while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do begin alldomain.Add (netres[a].lpremotename); a:=a+1; end; wnetcloseenum(enumhandle); // 获取所有的计算机 mylistitems :=controlcenter.lstcomputer.Items ; mylistitems.Clear ; for i:=0 to alldomain.Count-1 do begin with netres[0] do begin dwscope :=RESOURCE_GLOBALNET; dwtype :=RESOURCETYPE_ANY; dwdisplaytype :=RESOURCEDISPLAYTYPE_SERVER; dwusage :=RESOURCEUSAGE_CONTAINER; lplocalname :=nil; lpremotename :=pchar(alldomain[i]); lpcomment :=nil; lpprovider :=nil; end; ErrCode:=WNetOpenEnum(RESOURCE_GLOBALNET,RESOURCETYPE_ANY,RESOURCEUSAGE_CONTAINER,@netres[0],EnumHandle); if errcode=NO_ERROR then begin EnumEntries:=1024; BufferSize:=SizeOf(NetRes); ErrCode:=WNetEnumResource(EnumHandle,EnumEntries,@NetRes[0],BufferSize); end; a:=0; while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do begin mylistitem :=mylistitems.Add ; mylistitem.ImageIndex :=0; mylistitem.Caption :=uppercase(stringreplace(string(NetRes[a].lpremotename),'//','',[rfReplaceAll])); a:=a+1; end; wnetcloseenum(enumhandle); end; end; ◇[DELPHI]获取某一计算机上的共享目录 procedure getsharefolder(const computername:string); var errcode,a:integer; netres:array[0..1023] of netresource; enumhandle:thandle; enumentries,buffersize:dword; s:string; mylistitems:tlistitems; mylistitem:tlistitem; mystrings:tstringlist; begin with netres[0] do begin dwscope :=RESOURCE_GLOBALNET; dwtype :=RESOURCETYPE_DISK; dwdisplaytype :=RESOURCEDISPLAYTYPE_SHARE; dwusage :=RESOURCEUSAGE_CONTAINER; lplocalname :=nil; lpremotename :=pchar(computername); lpcomment :=nil; lpprovider :=nil; end; // 获取根结点 errcode:=wnetopenenum(RESOURCE_GLOBALNET,RESOURCETYPE_DISK,RESOURCEUSAGE_CONTAINER,@netres[0],enumhandle); if errcode=NO_ERROR then begin EnumEntries:=1024; BufferSize:=SizeOf(NetRes); ErrCode:=WNetEnumResource(EnumHandle,EnumEntries,@NetRes[0],BufferSize); end; wnetcloseenum(enumhandle); a:=0; mylistitems:=controlcenter.lstfile.Items ; mylistitems.Clear ; while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do begin with mylistitems do begin mylistitem:=add; mylistitem.ImageIndex :=4; mylistitem.Caption :=extractfilename(netres[a].lpremotename); end; a:=a+1; end; end; ◇[DELPHI]得到硬盘序列号 var SerialNum : pdword; a, b : dword; Buffer : array [0..255] of char; begin if GetVolumeInformation('c:/', Buffer, SizeOf(Buffer), SerialNum, a, b, nil, 0) then Label1.Caption := IntToStr(SerialNum^); end; 1.关于MDI主窗体背景新解 在Form中添加Image控件 设BMP图象 name为 IMG_BK 在Foem的Create事件中写入 Self.brush.bitmap:=img_bk.picture.bitmap; 2.在标题栏处画VCL控件(一行解决问题!!!) 在 form 的onpaint 事件中 控件.pointto(getdc(0),left,top); 3 Edit 中只输入数字 SetWindowLong(Edit1.Handle, GWL_STYLE, GetWindowLong(Edit1.Handle, GWL_STYLE) or ES_NUMBER); 4.类似MDI方式新解 在要设置child的oncreate方式下写入: self.parent:='要设置为mainform的Form'; 5. 屏幕的Refresh(只需一行!) RedrawWindow(0,nil,0,RDW_ERASE or RDW_INVALIDATE or RDW_ALLCHILDREN); | | --- ---- handle RGN(可刷新局部屏幕) 6.类似DOS下的CLS指令的WINDOWS指令! paintdesktop(getdc(0)); 7.扩展控件新功能 在编程中 ,我们经常要控制控件的动作,但该控件又没有提供该方法 这时 ,可通过发消息给该控件 ,以达到我们的目的! 如: button1.perform(wm_keydown,13,0); listbox1.perform(wm_vscroll,sb_linedown,0); 等等 可少去 重载之苦!!!!! 8.闪烁标题如打印机超时(一行) form 放一timer 控件 time 事件 中 写入 ; flashwindow(application.handle,true); 9.在桌面上加个VCL控件!(不是画的,不可refresh) windows.setparent(控件.handle,0); 注: 想放哪都行 (如'开始处状态栏') 10.关于 '类似MDI方式新解(一行就行!!!!)'的修正 windows.setparent(self.handle,'要设置为mainform的Form'); 11 普通Form象MDI中mainform始终在最底层 SetActiveWindow(0); 或 SetwindowPos(...); 12 执行下列语句开始Windows屏幕保护程序 SendMessage(HWND_BROADCAST,WM_SYSCOMMAND,SC_SCREENSAVE,0); 13 button 的 caption 多行显示： SetWindowLong(Button1.handle, GWL_STYLE, GetWindowlong(Button1.Handle, GWL_STYLE) or BS_MULTILINE); 必要时加上 Button1.Invalidate; 14.整死windows98 :) asm int $19 end Q: 怎么来改变ListBox的字体呢？就修改其中的一行。 A: 先把ListBox1.Style 设成lbOwnerDrawFixed 然后在 OnDrawItem 事件下写下如下代码 procedure TForm1.ListBox1DrawItem(Control: TWinControl; Index: Integer; Rect: TRect; State: TOwnerDrawState); var Offset: Integer; begin Offset := 2; with (Control as TListBox).Canvas do begin FillRect(Rect); if Index = 2 then begin Font.Name := 'Fixedsys'; Font.Color := clRed; Font.Size := 12; end else begin Font.Name := 'Arial'; Font.Color := clBlack; Font.Size := 8; end; if odSelected in State then begin Font.Color := clWhite; end; TextOut(Rect.Left + Offset, Rect.Top, (Control as TListBox).Items[Index]); end; end; Q：怎么在RichEdit里面插入图片？ A: 请到这里来看看会找到答案 http://www.undu.com/Articles/991107c.html Q：怎么才能目录呢？ A：我来。 uses ShellAPI; procedure DeleteFiles(Source: string); var FO: TShFileOpStruct; begin FillChar(FO,SizeOf(FO),#0); FO.Wnd := Form1.Handle; FO.wFunc := FO_DELETE; FO.pFrom := PChar(Source); ShFileOperation(FO); end; procedure EmptyDirectory(Path: String); begin if DirectoryExists(Path) then begin DeleteFiles(Path+'/*'); end else ForceDirectories(Path); end; Q:如何映射网络驱动器？ 比如我要把//Server/sys映射为F盘。我需要一个函数比如 给出输入参数为//server/sys/home/bruno给我的返回值是F:/home/bruno A： Function UNCToDrive(UNCPath: STring): STring; var DriveNum: Integer; DriveChar: Char; DriveBits: set of 0..25; StartSTr,TestStr: STring; begin result := UNCPath; StartSTr := UNCPath; Integer(DriveBits) := GetLogicalDrives; for DriveNum := 0 to 25 do begin if (DriveNum in DriveBits) then begin DriveChar := Char(DriveNum + Ord('A')); TestSTr := ExpandUNCFileName(DriveChar+':/'); If TEstStr <> '' then If Pos(Uppercase(TestSTr),Uppercase(STartSTr)) > 0 then begin Delete(StartSTr,1,Length(TestSTr)); result := DriveChar+':/'+StartSTr; break; end; end; end; end; Q：我有一些特殊语言的字体来用，它们存储在我的EXE文件里，但是两点。 * 我不想放到font文件夹里 * 我不想从EXE文件里面提取出来 如果可能，请告诉我。 因为，我的字体是自己做的不是windows自带的，我想保护自己的东西。 A:不太可能，必须提取出来。你可以使用这个保护过程来保护你的文件不被修改和删除。 在EXE执行的时候把字体放到临时文件夹里，结束的时候删除它。 function ProtectFile(sFilename : string) : hFile; var hf: hFile; lwHFileSize, lwFilesize: longword; ofs : TOFStruct; begin if FileExists(sFilename) then begin hf := OpenFile(pchar(sFilename), ofs, OF_READ or OF_WRITE or OF_SHARE_EXCLUSIVE); if hf <> 0 then begin lwFilesize := GetFileSize(hf, @lwHFileSize); if LockFile(hf, 0, 0, lwFilesize, lwHFilesize) then Result := hf else Result := 0; end else Result := 0; end else Result := 0; end; //.. var ResS: TResourceStream; TempPath: array [0..MAX_PATH] of Char; TempDir: string; begin GetTempPath(Sizeof(TempPath), TempPath); TempDir := StrPas(Path); ResS := TResourceStream.Create(hInstance, 'SOME_FONT', 'RT_FONT'); ResS.SavetoFile(TempDir+'some_font.ttf'); ResS.Free; AddFontResource(TempDir+'some_font.ttf'); SendMessage(HWND_BROADCAST, WM_FONTCHANGE, 0, 0); ProtectFile(TempDir+'some_font.ttf'); end; Q：如何得到当前的ProgramFiles得路径？ A：用读写注册表的方法就可以做到。 代码如下： uses registry; procedure TForm1.Button1Click(Sender: TObject); var reg:TRegistry; begin reg:=TRegistry.Create; reg.RootKey:=HKEY_LOCAL_MACHINE; if reg.OpenKey('SOFTWARE/Microsoft/Windows/CurrentVersion',false) then begin edit1.Text:=reg.ReadString('ProgramFilesDir'); reg.CloseKey; reg.Free; end; end; Q:如何在Jpg图像上写上字？ A：这里有个代码。 hmm, here's a sample with help of Bitmap, you can chance the brush style of canvas to bsClear to make the text transparent uses Jpeg; procedure TForm1.Button1Click(Sender: TObject); var Bmp : TBitmap; Jpg : TJpegImage; begin try Bmp := TBitmap.Create; Jpg := TjpegImage.Create; Jpg.LoadFromFile('c:/img.jpg'); Bmp.Assign(Jpg); Bmp.Canvas.Brush.Style := bsClear; Bmp.Canvas.Font.Color := clYellow; Bmp.Canvas.TextOut(10,10,'Hello World'); Jpg.Assign(Bmp); Jpg.SaveToFile('c:/img2.jpg'); finally bmp.Free; jpg.Free; end; end; Q：怎么用delphi修改文件的时间呢？ 在windows下，属性里面有三个日起，创建，修改，存储。我怎么来修改啊？ A：Here is the excerpt from the Jedi Code Library. If it is not complete then get the JCL. type // indicates the file time to set, used by SetFileTimesHelper and SetDirTimesHelper TFileTimes = (ftLastAccess, ftLastWrite, ftCreation); function SetFileTimesHelper(const FileName: string; const DateTime: TDateTime; Times: TFileTimes): Boolean; var Handle: THandle; FileTime: TFileTime; SystemTime: TSystemTime; begin Result := False; Handle := CreateFile(PChar(FileName), GENERIC_WRITE, FILE_SHARE_READ, nil, OPEN_EXISTING, 0, 0); if Handle <> INVALID_HANDLE_VALUE then try //SysUtils.DateTimeToSystemTime(DateTimeToLocalDateTime(DateTime), SystemTime); SysUtils.DateTimeToSystemTime(DateTime, SystemTime); if Windows.SystemTimeToFileTime(SystemTime, FileTime) then begin case Times of ftLastAccess: Result := SetFileTime(Handle, nil, @FileTime, nil); ftLastWrite: Result := SetFileTime(Handle, nil, nil, @FileTime); ftCreation: Result := SetFileTime(Handle, @FileTime, nil, nil); end; end; finally CloseHandle(Handle); end; end; //-------------------------------------------------------------------------------------------------- function SetFileLastAccess(const FileName: string; const DateTime: TDateTime): Boolean; begin Result := SetFileTimesHelper(FileName, DateTime, ftLastAccess); end; //-------------------------------------------------------------------------------------------------- function SetFileLastWrite(const FileName: string; const DateTime: TDateTime): Boolean; begin Result := SetFileTimesHelper(FileName, DateTime, ftLastWrite); end; //-------------------------------------------------------------------------------------------------- function SetFileCreation(const FileName: string; const DateTime: TDateTime): Boolean; begin Result := SetFileTimesHelper(FileName, DateTime, ftCreation); end; google上的有关delphi得网址： http://directory.google.com/Top/Computers/Programming/Languages/Delphi/?tc=1 yahoo上有关delphi得网址 http://dir.yahoo.com/Computers_and_Internet/Programming_and_Development/Languages/Delphi/ 删掉程序自己的exe文件 procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction); var F:TextFile; begin AssignFile(F,'delself.bat'); Rewrite(F);{F为TextFile类型} WriteLn(F,'del '+ExtractFileName(Application.ExeName)); WriteLn(F,'del %0'); //删除自己delself.bat CloseFile(F); WinExec('delself.bat',SW_HIDE); end; if ord(s[9])>128 then ShowMessage('该位置字符是汉字'); 汉字是双字节的 更改系统时间格式： var str: string; begin str := 'yyyy-mm-dd'; if SetLocaleInfoa(LOCALE_SYSTEM_DEFAULT, LOCALE_SLONGDATE, PChar(str)) then begin showmessage('更改日期格式成功'); end; end; 休息一分钟： var I:integer; begin i:=gettickcount; while (Gettickcount-i)<=10000 do application.ProcessMessages;//保证消息循环 end; 取主文件名: function retuFileName(const FileName: string): string; var I: Integer; begin I := LastDelimiter('.', FileName); Result := Copy(FileName, 1, i-1); end; (1).按下ctrl和其它键之后发生一事件。 procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState); begin if (ssCtrl in Shift) and (key =67) then showmessage('keydown Ctrl+C'); end; (2).Dbgrid中用Enter键代替Tab键. procedure TForm1.DBGrid1KeyPress(Sender: TObject; var Key: Char); begin if Key = #13 then if ActiveControl = DBGrid1 then begin TDBGrid(ActiveControl).SelectedIndex := TDBGrid(ActiveControl).SelectedIndex + 1; Key := #0; end; end; (3).Dbgrid中选择多行发生一事件。 procedure TForm1.Button1Click(Sender: TObject); var i:integer; bookmarklist:Tbookmarklist; bookmark:tbookmarkstr; begin bookmark:=adoquery1.Bookmark; bookmarklist:=dbgrid1.SelectedRows; try begin for i:=0 to bookmarklist.Count-1 do begin adoquery1.Bookmark:=bookmarklist[i]; with adoquery1 do begin edit; fieldbyname('mdg').AsString:=edit2.Text; post; end; end; end; finally adoquery1.Bookmark:=bookmark; end; end; (4).Form的一个出现效果。 procedure TForm1.Button1Click(Sender: TObject); var r:thandle; i:integer; begin for i:=1 to trunc(width/1.414) do begin r:=CreateEllipticRgn(trunc(width/2)-i,trunc(height/2)-i,trunc(width/2)+i,trunc(height/2)+i); SetWindowRgn(handle,r,true); Application.ProcessMessages; sleep(1); end; end; (5).用Enter代替Tab在编辑框中移动隹点。 procedure TForm1.FormKeyPress(Sender: TObject; var Key: Char); begin if key=#13 then begin if not (Activecontrol is Tmemo) then begin key:=#0; keybd_event(vk_tab,mapvirtualkey(vk_tab,0),0,0); end; end; end; (6).Progressbar加上色彩。 const {$EXTERNALSYM PBS_MARQUEE} PBS_MARQUEE = 08; var Form1: TForm1; implementation {$R *.dfm} uses CommCtrl; procedure TForm1.Button1Click(Sender: TObject); begin // Set the Background color to teal Progressbar1.Brush.Color := clTeal; // Set bar color to yellow SendMessage(ProgressBar1.Handle, PBM_SETBARCOLOR, 0, clYellow); end; (7).住点移动时编辑框色彩不同。 procedure TForm1.Edit1Enter(Sender: TObject); begin (sender as tedit).Color:=clred; end; procedure TForm1.Edit1Exit(Sender: TObject); begin (sender as tedit).Color:=clwhite; end; (8).备份和恢复 procedure TForm1.Button1Click(Sender: TObject); begin if OpenDialog1.Execute then begin try adoconnection1.Connected:=False; adoconnection1.ConnectionString:='Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=master;Data Source=FRIEND-YOFZKSCO;'+ 'Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=FRIEND-YOFZKSCO;Use Encryption for Data=False;Tag with column collation when possible=False'; adoconnection1.Connected:=True; with adoQuery1 do begin Close; SQL.Clear; SQL.Add('Backup DataBase sfa to disk ='''+opendialog1.FileName+''''); ExecSQL; end; except ShowMessage('±?·Y꧰ü'); Exit; end; end; Application.MessageBox('1§?2?ú￡?êy?Y±?·Y3é1|','ìáê?',MB_OK + MB_ICONINFORMATION); end; procedure TForm1.Button2Click(Sender: TObject); begin if OpenDialog1.Execute then begin try adoconnection1.Connected:=false; adoconnection1.ConnectionString:='Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=master;Data Source=FRIEND-YOFZKSCO;'+ 'Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=FRIEND-YOFZKSCO;Use Encryption for Data=False;Tag with column collation when possible=False'; adoconnection1.Connected:=true; with adoQuery1 do begin Close; SQL.Clear; SQL.Add('Restore DataBase sfa from disk ='''+opendialog1.FileName+''''); ExecSQL; end; except ShowMessage('???′꧰ü'); Exit; end; end; Application.MessageBox('1§?2?ú￡?êy?Y???′3é1|','ìáê?',MB_OK + MB_ICONINFORMATION); end; (9).查找局域网上的sqlserver报务器。 uses Comobj; procedure TForm1.Button1Click(Sender: TObject); var SQLServer:Variant; ServerList:Variant; i,nServers:integer; sRetValue:String; begin SQLServer := CreateOleObject('SQLDMO.Application'); ServerList:= SQLServer.ListAvailableSQLServers; nServers:=ServerList.Count; for i := 1 to nservers do ListBox1.Items.Add(ServerList.Item(i)); SQLServer:=NULL; serverList:=NULL; end; (10).窗体打开时的淡入效果。 procedure TForm1.FormCreate(Sender: TObject); begin AnimateWindow (Handle, 400, AW_CENTER); end; (11).动态创建窗体。 procedure TForm1.Button1Click(Sender: TObject); begin try form2:=Tform2.Create(self); form2.ShowModal; finally form2.Free; end; end; procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction); begin action:=cafree; end; procedure TForm1.FormDestroy(Sender: TObject); begin form1:=nil; end; (12).复制文件。 procedure TForm1.Button1Click(Sender: TObject); begin try copyfileA(pchar('C:/AAA.txt'),pchar('D:/AAA.txt'),false); except showmessage('sfdsdf'); end; end; (13).复制文件夹。 uses shellAPI; procedure TForm1.Button1Click(Sender: TObject); var lpFileOp: TSHFileOpStruct; begin with lpFileOp do begin Wnd:=Self.Handle; wfunc:=FO_COPY; pFrom:=pchar('C:/AAA'); pTo:=pchar('D:/AAA'); fFlags:=FOF_ALLOWUNDO; hNameMappings:=nil; lpszProgressTitle:=nil; fAnyOperationsAborted:=True; end; if SHFileOperation(lpFileOp)<>0 then ShowMessage('删除失败'); end; (14).改变Dbgrid的选定色。 procedure TForm1.DBGrid1DrawDataCell(Sender: TObject; const Rect: TRect; Field: TField; State: TGridDrawState); begin if gdSelected in state then SetBkColor(dbgrid1.canvas.handle,clgreen) else setbkcolor(dbgrid1.canvas.handle,clwhite); dbgrid1.Canvas.TextRect(rect,0,0,field.AsString); dbgrid1.Canvas.Textout(rect.Left,rect.Top,field.AsString); end; (15).检测系统是否已安装了ADO。 uses registry; function Tform1.ADOInstalled:Boolean; var r:TRegistry; s:string; begin r := TRegistry.create; try with r do begin RootKey := HKEY_CLASSES_ROOT; OpenKey( '/ADODB.Connection/CurVer', false ); s := ReadString(''); if s <> '' then Result := True else Result := False; CloseKey; end; finally r.free; end; end; procedure TForm1.Button1Click(Sender: TObject); begin if ADOInstalled then showmessage('this computer has installed ADO'); end; (16).取利主机的ip地址。 uses winsock; procedure TForm1.Button1Click(Sender: TObject); var IP:string; IPstr:String; buffer:array[1..32] of char; i:integer; WSData:TWSAdata; Host:PHostEnt; begin if WSAstartup(2,WSData)<>0 then begin showmessage('WS2_32.DLL3?ê??ˉ꧰ü.'); exit; end; try if GetHostname(@buffer[1],32)<>0 then begin showmessage('??óDμ?μ??÷?ú??.'); exit; end; except showmessage('??óD3é1|·μ???÷?ú??'); exit; end; Host:=GetHostbyname(@buffer[1]); if Host=nil then begin showmessage('IPμ??·?a??.'); exit; end else begin edit2.Text:=Host.h_name; edit3.Text:=chr(host.h_addrtype+64); for i:=1 to 4 do begin IP:=inttostr(ord(host.h_addr^[i-1])); if i<4 then ipstr:=ipstr+IP+'.' else edit1.Text:=ipstr+ip; end; end; WSACleanup; end; (17).取得计算机名。 function tform1.get_name:string; var ComputerName: PChar; size: DWord; begin GetMem(ComputerName,255); size:=255; if GetComputerName(ComputerName,size)=False then result:='' else result:=ComputerName; FreeMem(ComputerName); end; procedure TForm1.Button1Click(Sender: TObject); begin label1.Caption:=get_name; end; (18).取得硬盘序列号。 function tform1.GetHDSerialNumber: LongInt; {$IFDEF WIN32} var pdw : pDWord; mc, fl : dword; {$ENDIF} begin {$IfDef WIN32} New(pdw); GetVolumeInformation('c:/',nil,0,pdw,mc,fl,nil,0); Result := pdw^; dispose(pdw); {$ELSE} Result := GetWinFlags; {$ENDIF} end; procedure TForm1.Button1Click(Sender: TObject); begin edit1.Text:=inttostr(gethdserialnumber); end; (19).限定光标移动范围。 procedure TForm1.Button1Click(Sender: TObject); var rect1:trect; begin rect1:=button2.BoundsRect; mapwindowpoints(handle,0,rect1,2); clipcursor(@rect1); end; procedure TForm1.Button2Click(Sender: TObject); var screenrect:trect; begin screenrect:=rect(0,0,screen.Width,screen.Height); clipcursor(@screenrect); end; (20).限制edit框只能输入数字。 procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char); begin if not (key in ['0'..'9','.',#8]) then begin key:=#0; Messagebeep(0); end; end; (21).dbgrid中根据任一条件某一格变色。 procedure TForm_main.DBGridEh1DrawColumnCell(Sender: TObject; const Rect: TRect; DataCol: Integer; Column: TColumnEh; State: TGridDrawState); begin if (trim(DataModule1.ADOQuery1.FieldByName('dczt').AsString)='OK') then begin if datacol=6 then begin DbGrideh1.Canvas.Brush.Color:=clGradientActiveCaption; DbGrideh1.DefaultDrawColumnCell(Rect,datacol,column,state); end; end; end; (22).打开word文件。 procedure TfjfsglForm.SpeedButton4Click(Sender: TObject); var MSWord: Variant; str:string; begin if trim(DataModule1.adoquery27.fieldbyname('fjmc').asstring)<>'' then begin str:=trim(DataModule1.ADOQuery27.fieldbyname('fjmc').AsString); MSWord:= CreateOLEObject('Word.Application');// MSWord.Documents.Open('d:/Program Files/Common Files/Sfa/'+str, True);// MSWord.Visible:=1;// str:=''; MSWord.ActiveDocument.Range(0, 0);// MSWord.ActiveDocument.Range.InsertAfter(str);//?úWord?D???ó×?·?'Title' MSWord.ActiveDocument.Range.InsertParagraphAfter; end else showmessage(''); end; (23).word文件传入和传出数据库。 uses IdGlobal; procedure TdjhyForm.SpeedButton2Click(Sender: TObject); var sfilename:string; function BlobContentTostring(const Filename:string):string; begin with Tfilestream.Create(filename,fmopenread) do try setlength(result,size); read(pointer(result)^,size); finally free; end; end; begin if opendialog1.Execute then begin sfilename:=opendialog1.FileName; DataModule1.ADOQuery14.Edit; DataModule1.ADOQuery14.FieldByName('word').AsString:=blobcontenttostring(sfilename); DataModule1.ADOQuery14.Post; end; end; procedure TdjhyForm.SpeedButton1Click(Sender: TObject); var sfilename:string; bs:Tadoblobstream; begin bs:=Tadoblobstream.Create(TBLOBfield(DataModule1.ADOQuery14.FieldByName('word')),bmread); try sfilename:=extractfilepath(application.ExeName)+trim(DataModule1.adoquery14.fieldbyname('hybh').AsString); sfilename:=sfilename+'.'+'doc'; bs.SaveToFile(sfilename); try djhyopenform:=Tdjhyopenform.Create(self); djhyopenform.olecontainer1.CreateObjectFromFile(sfilename,false); djhyopenform.OleContainer1.Iconic:=true; djhyopenform.ShowModal; finally djhyopenform.Free; end; finally bs.free; end; end; (24).中文标题的提示框。 procedure TdjhyForm.SpeedButton5Click(Sender: TObject); begin if Application.MessageBox('', Mb_YesNo + Mb_IconWarning) =Id_yes then DataModule1.ADOQuery14.Delete; end; (25).运行一应用程序文件。 WinExec('HH.EXE D:/Program files/common files/MyshipperCRM e-sales help/MyshipperCRM e-sales help.chm',SW_NORMAL);