创建一个基本的 Win32 窗口

 #include <Windows.h>

 //Forward declarations
 bool InitMainWindow(HINSTANCE, int);
 LRESULT CALLBACK MsgProc(HWND, UINT, WPARAM, LPARAM);

 //Constants
 const int WIDTH = ;
 const int HEIGHT = ;

 HWND hwnd = NULL;

 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
 {
     //Initialize the window
     if (!InitMainWindow(hInstance, nCmdShow))
     {
         return ;
     }

     //Main message loop
     MSG msg = {};
     while (WM_QUIT != msg.message)
     {
         if (PeekMessage(&msg, NULL, , , PM_REMOVE))
         {
             TranslateMessage(&msg);
             DispatchMessage(&msg);
         }
     }

     return static_cast<int>(msg.wParam);
 }

 bool InitMainWindow(HINSTANCE hInstance, int nCmdShow)
 {
     WNDCLASSEX wcex;
     wcex.cbSize = sizeof(wcex);
     wcex.style = CS_HREDRAW | CS_VREDRAW;
     wcex.cbClsExtra = ;
     wcex.cbWndExtra = ;
     wcex.lpfnWndProc = MsgProc;
     wcex.hInstance = hInstance;
     wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
     wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
     wcex.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
     wcex.lpszClassName = "Basic Win32 Window";
     wcex.lpszMenuName = NULL;
     wcex.hIconSm = LoadIcon(NULL, IDI_WINLOGO);

     //Register window class
     if (!RegisterClassEx(&wcex))
     {
         return false;
     }

     //Create window
     hwnd = CreateWindow(
         "Basic Win32 Window",
         "Win32 Window",
         WS_OVERLAPPED | WS_SYSMENU | WS_CAPTION,
         GetSystemMetrics(SM_CXSCREEN) /  - WIDTH / ,
         GetSystemMetrics(SM_CYSCREEN) /  - HEIGHT / ,
         WIDTH,
         HEIGHT,
         (HWND)NULL,
         (HMENU)NULL,
         hInstance,
         (LPVOID*)NULL);

     if (!hwnd)
     {
         return false;
     }

     ShowWindow(hwnd, nCmdShow);

     return true;
 }

 LRESULT CALLBACK MsgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     switch (msg)
     {
     case WM_DESTROY:
         PostQuitMessage();
         return ;

     case WM_CHAR:
         switch (wParam)
         {
         case VK_ESCAPE:
             PostQuitMessage();
             return ;
         }
         return ;
     }

     return DefWindowProc(hwnd, msg, wParam, lParam);
 }