WinAPI 字符及字符串函数(14): CharToOem、OemToChar

CharToOemBuff、OemToCharBuff 与 CharToOem、OemToChar 的区别只是前者可以指定要转换的字符数.

---

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    Button1: TButton;

    Button2: TButton;

    Button3: TButton;

    Button4: TButton;

    procedure Button1Click(Sender: TObject);

    procedure Button2Click(Sender: TObject);

    procedure Button4Click(Sender: TObject);

    procedure Button3Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



procedure TForm1.Button1Click(Sender: TObject);

var

  Buf: PWideChar;

  AnsiBuf: array[0..255] of AnsiChar;

begin

  Buf := '万一的 Delphi 博客';

  CharToOem(Buf, AnsiBuf);

  ShowMessage(string(AnsiBuf)); {万一的 Delphi 博客}



  FillChar(AnsiBuf, Length(AnsiBuf), #0);



  CharToOemBuff(Buf, AnsiBuf, 6);

  ShowMessage(string(AnsiBuf)); {万一的 De}

end;



procedure TForm1.Button2Click(Sender: TObject);

var

  str: string;

  p: PAnsiChar;

begin

  str := '万一的 Delphi 博客';



  p := GetMemory(256);

  CharToOem(PChar(str), p);

  ShowMessage(string(p)); {万一的 Delphi 博客}

  FreeMemory(p);



  p := GetMemory(256);

  CharToOemBuff(PChar(str), p, 6);

  ShowMessage(string(p)); {万一的 De}

  FreeMemory(p);

end;



procedure TForm1.Button3Click(Sender: TObject);

var

  AnsiBuf: PAnsiChar;

  Buf: array[0..255] of Char;

begin

  AnsiBuf := '万一的 Delphi 博客';

  OemToChar(AnsiBuf, buf);

  ShowMessage(string(Buf)); {万一的 Delphi 博客}



  FillChar(Buf, Length(Buf), #0);



  OemToCharBuff(AnsiBuf, buf, 6);

  ShowMessage(string(Buf)); {万一的}

end;



procedure TForm1.Button4Click(Sender: TObject);

var

  AnsiStr: AnsiString;

  p: PChar;

begin

  AnsiStr := '万一的 Delphi 博客';



  p := StrAlloc(256);

  OemToChar(PAnsiChar(AnsiStr), p);

  ShowMessage(string(p)); {万一的 Delphi 博客}

  StrDispose(p);



  p := StrAlloc(256);

  OemToCharBuff(PAnsiChar(AnsiStr), p, 6);

  ShowMessage(string(p)); {万一的}

  StrDispose(p);

end;



end.