用c语言创建windows窗口

耐得住寂寞，禁得起诱惑，这就是程序人生

步骤：

1.在WinMain中定义各种变量

2.注册窗口类RegisterClass

3.创建窗口CreateWindow

4.显示窗口和更新窗口

ShowWindow (hwnd, iCmdShow) ;

     UpdateWindow (hwnd) ;

5.消息循环

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

#include <windows.h>

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

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd )
{
     MSG      msg;
     HWND     hwnd;
     static TCHAR szAppName[] = "hl";

     WNDCLASS wndclass;
     wndclass.style        = CS_HREDRAW | CS_VREDRAW;
     wndclass.cbClsExtra   = 0;
     wndclass.cbWndExtra   = 0;
     wndclass.lpfnWndProc  = MyProc;
     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("error"),TEXT("title"),MB_ICONERROR);
          return 0;
     }
     hwnd = CreateWindow(szAppName,
                              TEXT("Hello"),
                              WS_OVERLAPPEDWINDOW,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              NULL,
                              NULL,
                              hInstance,
                              NULL
                              );
     ShowWindow(hwnd,nShowCmd);
     UpdateWindow(hwnd);

     while(GetMessage(&msg,hwnd,0,0))
     {
          TranslateMessage(&msg);
          DispatchMessage(&msg);
     }
     return msg.wParam;
}

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

     switch(message)
     {
     case WM_DESTROY:
          PostQuitMessage(0);
          return 0;
     }
     return DefWindowProc(hwnd,message,wParam,lParam);
}

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