1 #include <windows.h> 2 #include "resource.h" 3  4 LRESULT CALLBACK MyWndProc(  HWND hwnd,      // handle to window 5   UINT uMsg,      // message identifier 6   WPARAM wParam,  // first message parameter 7   LPARAM lParam   // second message parameter 8   ); 9 10 int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd )11 {12     WNDCLASS wnd;13     HWND hwnd;14     MSG msg;15     TCHAR szAppName[40]; //定义应用程序名称16     wnd.style = CS_HREDRAW | CS_VREDRAW; //水平或垂直改变窗口都被重绘 与MyWndProc的WM_PAINT消息关联17     wnd.lpfnWndProc = MyWndProc;18     wnd.cbClsExtra = 0;19     wnd.cbWndExtra = 0;20     wnd.hIcon = LoadIcon(NULL, IDI_APPLICATION);21     wnd.hCursor = LoadCursor(NULL, IDC_ARROW);22     wnd.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);23     wnd.lpszMenuName = NULL;24     wnd.lpszClassName = "HelloClass"; //窗口类标识,用在CreateWindow的第一个参数25     wnd.hInstance = hInstance;26     if(!RegisterClass(&wnd))27     {28         MessageBox(NULL, TEXT("无法创建窗口"), TEXT("ERROR"), MB_OK|MB_ICONERROR);29         return 0;30     }31 32     LoadString(hInstance, IDS_APPNAME, szAppName, sizeof(szAppName)); //LoadString函数为将资源复制到程序区缓存中33     hwnd = CreateWindow("HelloClass", szAppName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL); //第二个参数为窗口标题34     ShowWindow(hwnd, nShowCmd);35     while (GetMessage(&msg, NULL, 0, 0))36     {37         TranslateMessage(&msg);38         DispatchMessage(&msg);39     }40     return 0;41 }42 43 LRESULT CALLBACK MyWndProc(  HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)44 {45     HDC hdc; //定义设备环境句柄46     PAINTSTRUCT ps; //绘制结构47     RECT rect; //矩形结构48     switch(uMsg)49     {50     case WM_PAINT:51     {    52         hdc = BeginPaint(hwnd, &ps);53         GetClientRect(hwnd, &rect);54         DrawText(hdc, TEXT("Hello,World!"), -1, &rect, DT_SINGLELINE|DT_CENTER|DT_VCENTER);55         EndPaint(hwnd, &ps);56     }57     break;    58     case WM_DESTROY:59         PostQuitMessage(0);60         return 0;61     }62 63     return DefWindowProc(hwnd, uMsg, wParam, lParam);    64 }