Win32中创建窗口

//完整代码： #include <windows.h> LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM); int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, PSTR lpCmdLine,int iCmdShow) { static TCHAR szAppName[] = TEXT("HelloWorld"); HWND hwnd; MSG msg; WNDCLASS wndclass; wndclass.style = CS_HREDRAW|CS_VREDRAW; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION); wndclass.hCursor = LoadCursor(NULL,IDC_ARROW); wndclass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szAppName; if(!RegisterClass(&wndclass)) { MessageBox(NULL,TEXT("This program requires Windows NT!"), szAppName,MB_ICONERROR); return 0; } hwnd = CreateWindow(szAppName, TEXT("The Hello Program"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 600, 400, NULL, NULL, hInstance, NULL); ShowWindow(hwnd,iCmdShow); UpdateWindow(hwnd); while(GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam) { HDC hdc; PAINTSTRUCT ps; RECT rect; switch(message) { case WM_CREATE: return 0; case WM_PAINT: hdc = BeginPaint(hwnd,&ps); GetClientRect(hwnd,&rect); DrawText(hdc,TEXT("Hello，This is a Win32 Program!"),-1,&rect, DT_SINGLELINE|DT_CENTER|DT_VCENTER); EndPaint(hwnd,&ps); return 0; case WM_DESTROY: PostQuitMessage(0); return 0; } return DefWindowProc(hwnd,message,wParam,lParam); }

 

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Win32中创建窗口的步骤如下：

1.先定义窗口类的诸属性：

wndclass.style = CS_HREDRAW|CS_VREDRAW; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION); wndclass.hCursor = LoadCursor(NULL,IDC_ARROW); wndclass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szAppName;

 

2.注册窗口类：

RegisterClass(&wndclass)

3.调用CreateWindow（）创建窗口，返回该窗口句柄

hwnd = CreateWindow(szAppName, TEXT("The Hello Program"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 600, 400, NULL, NULL, hInstance, NULL);

 

4.显示和更新窗口：

ShowWindow(hwnd,iCmdShow); UpdateWindow(hwnd);

 

5.进入消息循环：

while(GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); }

6.编写窗口过程函数，用于响应窗口消息

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)

 

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效果如下图：