WIN32基本窗体程序框架

最新推荐文章于 2022-10-11 21:00:00 发布

原创最新推荐文章于 2022-10-11 21:00:00 发布 · 576 阅读

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文章标签：

#框架 #null #callback #winapi #application #include

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本文提供了一个简单的Windows程序示例，展示了如何使用基本的Windows API来创建窗口并响应消息。通过注册窗口类、创建窗口实例、显示窗口等步骤，实现了一个能够响应创建和销毁消息的小程序。

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#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);

int WINAPI WinMain(
HINSTANCE hInstance,      // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine,          // command line
int nCmdShow              // show state
)
{
static TCHAR szAppName[]=TEXT("Beeper2");
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 ("Program requires Windows NT!"),
       szAppName, MB_ICONERROR) ;
    return 0 ;
}

hwnd = CreateWindow (szAppName, TEXT ("Beeper2 Timer Demo"),
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT,
        CW_USEDEFAULT, CW_USEDEFAULT,
        NULL, NULL, hInstance, NULL) ;

ShowWindow(hwnd,nCmdShow);
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)
{
switch(message)
{
case WM_CREATE:
  return 0;
case WM_DESTROY:
  PostQuitMessage(0);
  return 0;
}

return DefWindowProc(hwnd,message,wParam,lParam);
}