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