创建一个基本的 Win32 窗口 

  1 #include <Windows.h>
  2 
  3 //Forward declarations
  4 bool InitMainWindow(HINSTANCE, int);
  5 LRESULT CALLBACK MsgProc(HWND, UINT, WPARAM, LPARAM);
  6 
  7 //Constants
  8 const int WIDTH = 800;
  9 const int HEIGHT = 600;
 10 
 11 HWND hwnd = NULL;
 12 
 13 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
 14 {
 15     //Initialize the window
 16     if (!InitMainWindow(hInstance, nCmdShow))
 17     {
 18         return 1;
 19     }
 20 
 21     //Main message loop
 22     MSG msg = {0};
 23     while (WM_QUIT != msg.message)
 24     {
 25         if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
 26         {
 27             TranslateMessage(&msg);
 28             DispatchMessage(&msg);
 29         }
 30     }
 31 
 32     return static_cast<int>(msg.wParam);
 33 }
 34 
 35 bool InitMainWindow(HINSTANCE hInstance, int nCmdShow)
 36 {
 37     WNDCLASSEX wcex;
 38     wcex.cbSize = sizeof(wcex);
 39     wcex.style = CS_HREDRAW | CS_VREDRAW;
 40     wcex.cbClsExtra = 0;
 41     wcex.cbWndExtra = 0;
 42     wcex.lpfnWndProc = MsgProc;
 43     wcex.hInstance = hInstance;
 44     wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
 45     wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
 46     wcex.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
 47     wcex.lpszClassName = "Basic Win32 Window";
 48     wcex.lpszMenuName = NULL;
 49     wcex.hIconSm = LoadIcon(NULL, IDI_WINLOGO);
 50 
 51     //Register window class
 52     if (!RegisterClassEx(&wcex))
 53     {
 54         return false;
 55     }
 56     
 57     //Create window
 58     hwnd = CreateWindow(
 59         "Basic Win32 Window",
 60         "Win32 Window",
 61         WS_OVERLAPPED | WS_SYSMENU | WS_CAPTION,
 62         GetSystemMetrics(SM_CXSCREEN) / 2 - WIDTH / 2,
 63         GetSystemMetrics(SM_CYSCREEN) / 2 - HEIGHT / 2,
 64         WIDTH,
 65         HEIGHT,
 66         (HWND)NULL,
 67         (HMENU)NULL,
 68         hInstance,
 69         (LPVOID*)NULL);
 70 
 71     if (!hwnd)
 72     {
 73         return false;
 74     }
 75 
 76     ShowWindow(hwnd, nCmdShow);
 77 
 78     return true;
 79 }
 80 
 81 LRESULT CALLBACK MsgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 82 {
 83     switch (msg)
 84     {
 85     case WM_DESTROY:
 86         PostQuitMessage(0);
 87         return 0;
 88 
 89     case WM_CHAR:
 90         switch (wParam)
 91         {
 92         case VK_ESCAPE:
 93             PostQuitMessage(0);
 94             return 0;
 95         }
 96         return 0;
 97     }
 98 
 99     return DefWindowProc(hwnd, msg, wParam, lParam);
100 }

 

posted @ 2016-10-16 11:19  owenlang  阅读(324)  评论(0)    收藏  举报