C++开发原生WIN32程序

VS2019 文件-新建-项目-Windows桌面向导(C++)-桌面应用程序 空项目

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程序内所有字符串用TEXT宏包裹

 1 #include <windows.h>
 2 
 3 LONG WINAPI WndProc(HWND, UINT, WPARAM, LPARAM);
 4 
 5 int WINAPI WinMain(
 6     _In_ HINSTANCE hInstance,
 7     _In_opt_ HINSTANCE hPrevInstance,
 8     _In_ LPSTR lpCmdLine,
 9     _In_ int nShowCmd)
10 {
11     WNDCLASS wc;
12     HWND hwnd;
13     MSG msg;
14 
15     wc.style = 0;
16     wc.lpfnWndProc = (WNDPROC)WndProc;
17     wc.cbClsExtra = 0;
18     wc.cbWndExtra = 0;
19     wc.hInstance = hInstance;
20     wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);
21     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
22     wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
23     wc.lpszMenuName = NULL;
24     wc.lpszClassName = "MyWndClass";
25 
26     RegisterClass(&wc);
27     hwnd = CreateWindow("MyWndClass", "SDK Application", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, HWND_DESKTOP, NULL, hInstance, NULL);
28     ShowWindow(hwnd, nShowCmd);
29     UpdateWindow(hwnd);
30 
31     while (GetMessage(&msg, NULL, 0, 0))
32     {
33         TranslateMessage(&msg);
34         DispatchMessage(&msg);
35     }
36     return msg.wParam;
37 }
38 
39 LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
40 {
41     PAINTSTRUCT ps;
42     HDC hdc;
43     switch (message)
44     {
45     case WM_PAINT:
46         hdc = BeginPaint(hwnd, &ps);
47         Ellipse(hdc, 0, 0, 200, 100);
48         EndPaint(hwnd, &ps);
49         return 0;
50     case WM_DESTROY:
51         PostQuitMessage(0);
52         return 0;
53     }
54     return DefWindowProc(hwnd, message, wParam, lParam);
55 }