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：