创建窗口代码-带注解

#include <windows.h>
// win32典型窗口代码


// 消息回调
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch (msg)
{
case WM_CLOSE:
DestroyWindow(hwnd); // 关闭窗口
break;
case WM_DESTROY:
PostQuitMessage(0); // 退出消息循环
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam); // 使用默认窗口处理方式
}
return 0;
}

INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR lpCmdLine, INT nCmdShow)
{
WNDCLASSEX wc; // 窗口类变量
HWND hwnd; // 窗口句柄
MSG msg; // 消息变量

const char g_szClassName[] = "myWindowClass";
// 注册窗口类