Windows通信机制和DLL机制
DLL
<1>event.h
#include<windows.h> #include<math.h> #ifndef LIB_H #define LIB_H extern "C" void _declspec(dllexport)setCalculate(HWND hwnd,HWND hwnd1,HWND hwnd2,HWND hwnd3,HWND hwnd4); extern "C" void _declspec(dllexport)setClearAll(HWND hwnd1,HWND hwnd2,HWND hwnd3,HWND hwnd4); #endif
<2>event.cpp
#include"event.h"
char Money[] = "";
char Rate[] = "";
char Year[] = "";
char Total[] = "";
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ +
+ *主函数：Check +
+ *功能： 输入判断函数 +
+ *参数： a[] 输入的字符串 +
+ *返回值：全是数字返回TRUE 否则返回FALSE +
+ +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
BOOL Check(char a[])
{
int i;
int len = strlen(a);
for(i=0;i<len;i++)
{
if(a[i]>'9'||a[i]<'0')
{
return FALSE;
}
}
return TRUE;
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ +
+ *主函数：setCalculate +
+ *功能： 为CalculateButton添加响应 +
+ 输入本金，利率，年 输出总钱数 +
+ *参数： hwnd 父窗口句柄 +
+ hwnd1 本金输入框句柄 +
+ hwnd2 利率输入框句柄 +
+ hwnd3 年数输入框句柄 +
+ hwnd4 输出框句柄 +
+ *返回值： +
+ +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void setCalculate(HWND hwnd,HWND hwnd1,HWND hwnd2,HWND hwnd3,HWND hwnd4)
{
GetWindowText(hwnd1,Money,20);
GetWindowText(hwnd2,Rate,20);
GetWindowText(hwnd3,Year,20);
double totalMoney;
if(Check(Money)&&Check(Rate)&&Check(Year))
{
totalMoney = atof(Money)*pow(1/atof(Rate)+1,atoi(Year));
gcvt(totalMoney,10,Total);
SetWindowText(hwnd4,Total);
}
else
{
MessageBox(hwnd,TEXT("对不起，你输入的格式不对"),TEXT("提示"),MB_OK);
SetWindowText(hwnd1,"");
SetWindowText(hwnd2,"");
SetWindowText(hwnd3,"");
SetWindowText(hwnd4,"");
}
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ +
+ *主函数：setClearAll +
+ *功能： 为ClearButton添加响应 +
+ 清空所有输入框输出框 +
+ *参数： hwnd1 本金输入框句柄 +
+ hwnd2 利率输入框句柄 +
+ hwnd3 年数输入框句柄 +
+ hwnd4 输出框句柄 +
+ *返回值： +
+ +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void setClearAll(HWND hwnd1,HWND hwnd2,HWND hwnd3,HWND hwnd4)
{
SetWindowText(hwnd1,"");
SetWindowText(hwnd2,"");
SetWindowText(hwnd3,"");
SetWindowText(hwnd4,"");
}
window
<1>window.h
//windows程序的头文件 #include<windows.h> extern char szTitle[]; //标题条字符串 extern char szWindowClass[]; //窗口类名 extern char szMenuName[] ; extern int ID,ID_1; //函数原型声明 ATOM InitApplication(HINSTANCE); //用来注册窗口类 BOOL InitInstance(HINSTANCE , int); //用来创建主窗口 LRESULT CALLBACK WndProc( HWND, UINT, WPARAM, LPARAM); //消息处理函数 int APIENTRY WinMain( HINSTANCE , HINSTANCE , LPSTR , int); //主函数 BOOL CreateControl(HINSTANCE,HWND, LPSTR); //创建文本框
<2>window.cpp
#include "window.h"
#include<math.h>
//全局变量
char szTitle[] = "Windows通信机制和DLL机制"; //标题条字符串
char szWindowClass[] = "w32"; //窗口类名
char szMenuName[] = "NULL"; //菜单名
typedef void (*lpsetCalculateFun)(HWND ,HWND ,HWND ,HWND ,HWND);
typedef void (*lpsetClearAllFun)(HWND ,HWND ,HWND ,HWND);
HWND hwnd1,hwnd2,hwnd3,hwnd4,calculateButton,clearButton;
HWND hwnd;
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ +
+ *主函数：WinMain +
+ *功能： 初始化及注册窗口类，创建窗口，进入消息循环及终止应用程序 +
+ *参数： hInstance 当前实例 +
+ hPrevInstance 前一个实例 +
+ lpCmdLine 命令行 +
+ nCmdShow 选择显示窗口或图标 +
+ *返回值：msg.wParam +
+ +
++++++++++++++++++++++++++++++++++++++++++++++++*+++++++++++++++++++++++++++++++*/
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance , LPSTR lpCmdLine , int nCmdShow )
{
MSG msg; //声明消息结构对象
InitApplication( hInstance); //注册窗口
if( !InitInstance( hInstance, nCmdShow ) ) //初始化
{
return FALSE;
}
while ( GetMessage(&msg, (HWND) NULL, 0, 0) ) //消息循环
{
TranslateMessage(&msg); //检索消息
DispatchMessage(&msg); //将消息间接传给函数指针
}
return msg.wParam; //结束消息循环传回PostQuitMesage
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ +
+ *主函数：InitApplication +
+ *功能： 用来注册窗口类 +
+ *参数： hInstance 当前实例 +
+ *返回值：如果成功，返回一个唯一的整数，如果失败，返回0 +
+ +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
ATOM InitApplication(HINSTANCE hInstance)
{
WNDCLASS wc; //声明窗口结构对象
//初始化对象的域值
wc.style = CS_HREDRAW | CS_VREDRAW; // 如果大小改变了重绘窗口
wc.lpfnWndProc = WndProc; //窗口消息处理函数
wc.cbClsExtra = 0; // 无附加窗口类内存
wc.cbWndExtra = 0; // 无附加窗口内存
wc.hInstance = hInstance; //当前实例
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); // 图标
wc.hCursor = LoadCursor(NULL, IDC_ARROW); // 鼠标指针
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); // 背景画刷
wc.lpszClassName = szWindowClass; // 窗口类名
wc.lpszMenuName = szMenuName; //菜单名
return RegisterClass(&wc); //注册
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ +
+ *主函数：InitInstance +
+ *功能： 用来创建主窗口 +
+ *参数： hInstance 当前实例 +
+ nCmdShow 选择显示窗口或图标 +
+ *返回值：如果成功，返回一个非零值，如果失败，返回0 +
+ +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{ //声明窗口句柄
hwnd = CreateWindow(
szWindowClass, // 窗口类名，使用之前注册的主窗口类
szTitle, // 窗口名，显示在窗口标题栏上的字符串
WS_OVERLAPPEDWINDOW |WS_VSCROLL|WS_HSCROLL, //显示方式 具有水平和垂直滚动
CW_USEDEFAULT, // x起点坐标
CW_USEDEFAULT, // y起点坐标
400, // 宽
300, // 高
NULL, // 无父窗口
NULL, // 菜单句柄
hInstance, //实例句柄
NULL // 无窗口创建数据
);
if(!hwnd) // 判断是否创建成功
{
return FALSE;
}
CreateControl( hInstance, hwnd, NULL);
ShowWindow(hwnd, nCmdShow); //创建成功便显示窗口
UpdateWindow(hwnd); //送出WM_PAINT消息
return TRUE;
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ +
+ *主函数：CreateControl +
+ *功能： 创建文本框 +
+ *参数： hwndp 父窗口句柄 +
+ szTitle 窗口标题 +
+ *返回值： +
+ +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
BOOL CreateControl(HINSTANCE hInstance, HWND hwndp, LPSTR szTitle)
{
hwnd1 = CreateWindow( "edit",NULL, WS_CHILD |WS_VISIBLE|WS_BORDER,
50, 40,100, 20,
hwndp, NULL,hInstance, NULL);
calculateButton = CreateWindow( "BUTTON","计算", WS_CHILD |WS_VISIBLE|WS_BORDER,
180, 40,60, 20,
hwndp, NULL,hInstance, NULL);
clearButton = CreateWindow( "BUTTON","清除", WS_CHILD |WS_VISIBLE|WS_BORDER,
180, 70,60, 20,
hwndp, NULL,hInstance, NULL);
hwnd2 = CreateWindow( "edit",NULL, WS_CHILD |WS_VISIBLE|WS_BORDER,
50, 70,100, 20,
hwndp, NULL,hInstance, NULL);
hwnd3 = CreateWindow( "edit",NULL, WS_CHILD |WS_VISIBLE|WS_BORDER,
50, 100,100, 20,
hwndp, NULL,hInstance, NULL);
hwnd4 = CreateWindow( "EDIT",NULL, WS_CHILD |WS_VISIBLE|WS_VSCROLL|WS_BORDER|ES_LEFT|ES_MULTILINE|ES_AUTOVSCROLL,
50, 130,300, 100,
hwndp, NULL,hInstance, NULL);
ShowWindow(hwnd1, SW_SHOW);
ShowWindow(calculateButton, SW_SHOW);
ShowWindow(clearButton, SW_SHOW);
ShowWindow(hwnd2, SW_SHOW);
ShowWindow(hwnd3, SW_SHOW);
ShowWindow(hwnd4, SW_SHOW);
return TRUE;
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ +
+ *主函数：WndProc +
+ *功能： 消息处理函数 +
+ *参数： hwnd 实例句柄 +
+ message 消息 +
+ wParam MSG消息结构中的域 +
+ lParam MSG消息结构中的域 +
+ *返回值：0 +
+ +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
LRESULT CALLBACK WndProc(HWND hwnd , UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc;
switch(message)
{
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
TextOut(hdc, 150 , 10, "利息计算器", strlen("利息计算器"));
TextOut(hdc, 10 , 40, "本金:", strlen("本金:"));
TextOut(hdc, 10 , 70, "利率:", strlen("利率:"));
TextOut(hdc, 10 , 100, "年:", strlen("年:"));
EndPaint(hwnd,&ps);
break;
case WM_COMMAND:
HINSTANCE hDll;
lpsetCalculateFun setCalculateFun;
lpsetClearAllFun setClearAllFun;
hDll = LoadLibrary("..\\DLL\\Debug\\DLL.dll"); //获得DLL模块句柄
if(hDll!=NULL)
{
setCalculateFun = (lpsetCalculateFun)GetProcAddress(hDll,"setCalculate");//获取函数的导出地址
setClearAllFun = (lpsetClearAllFun)GetProcAddress(hDll,"setClearAll"); //获取函数的导出地址
if(setCalculateFun!=NULL)
{
if(LOWORD(lParam)==LOWORD(calculateButton))
{
setCalculateFun(hwnd,hwnd1,hwnd2,hwnd3,hwnd4);
}
}
if(setClearAllFun!=NULL)
{
if(LOWORD(lParam)==LOWORD(clearButton))
{
setClearAllFun(hwnd1,hwnd2,hwnd3,hwnd4);
}
}
FreeLibrary(hDll);
}
else
{
MessageBox(hwnd,TEXT("hDll创建不成功"),TEXT("提示"),MB_OK);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}