Windows 应用程序结构

Windows 应用程序结构

//win32程序结构示例 

//程序入口 
int APIENTRY _tWinMain(HINSTANCE hInstance, //该程序当前运行的实例句柄 
                     HINSTANCE hPrevInstance, //win32下无意义 
                     LPTSTR    lpCmdLine, //传递给该程序的命令行参数 
                     int       nCmdShow);  //程序窗口显示方式
//主消息循环 
while (GetMessage(&msg, NULL, 0, 0))
{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
}


//1.设计窗口类					 
typedef struct tagWNDCLASSEXW { //窗口结构体 
    UINT        cbSize;
    /* Win 3.x */
    UINT        style;
    WNDPROC     lpfnWndProc;
    int         cbClsExtra;
    int         cbWndExtra;
    HINSTANCE   hInstance;
    HICON       hIcon;
    HCURSOR     hCursor;
    HBRUSH      hbrBackground;
    LPCWSTR     lpszMenuName;
    LPCWSTR     lpszClassName;
    /* Win 4.0 */
    HICON       hIconSm;
} WNDCLASSEXW, *PWNDCLASSEXW, NEAR *NPWNDCLASSEXW, FAR *LPWNDCLASSEXW; 

//2.注册窗口类
RegisterClassEx(&wcex);

//3.创建窗口 
hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

//4.显示窗口 
ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);
   
//5.编写窗口消息响应函数 
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;

	switch (message)
	{
	case WM_COMMAND:
		wmId    = LOWORD(wParam);
		wmEvent = HIWORD(wParam);
		// Parse the menu selections:
		switch (wmId)
		{
		case IDM_ABOUT:
			DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
			break;
		case IDM_EXIT:
			DestroyWindow(hWnd);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}
		break;
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		// TODO: Add any drawing code here...
		EndPaint(hWnd, &ps);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}