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#include <Windows.h> LRESULT CALLBACK WndProc(HWND hwnd,UINT iMsg,WPARAM wParam,LPARAM lParam); class CApp{ static char szAppName[]; HWND hwnd; MSG msg; WNDCLASSEX wndclass; public: void InitInstance(HINSTANCE hInstance, PSTR szCmdLine, int iCmdShow); void Run();//Message WPARAM ExitInstance(); //exit //message handler void OnCreate(); void OnDraw(); void OnDestroy(); }; void CApp::InitInstance(HINSTANCE hInstance, PSTR szCmdLine, int iCmdShow) { wndclass.cbSize = sizeof(wndclass); wndclass.style = CS_HREDRAW|CS_VREDRAW; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra =0; wndclass.cbWndExtra= 0; wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION); wndclass.hCursor = LoadCursor(NULL,IDC_ARROW); wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szAppName; wndclass.hIconSm = LoadIcon(NULL,IDI_APPLICATION); RegisterClassEx(&wndclass); hwnd = CreateWindow(szAppName, "Hello Program", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL); ShowWindow(hwnd,iCmdShow); UpdateWindow(hwnd); } void CApp::Run(){ while(GetMessage(&msg,NULL,0,0)){ TranslateMessage(&msg); DispatchMessage(&msg); } } WPARAM CApp::ExitInstance(){ return msg.wParam; } char CApp::szAppName[]="HelloWin"; void CApp::OnCreate(){ } void CApp::OnDraw(){ HDC hdc; PAINTSTRUCT ps; RECT rect; hdc=BeginPaint(hwnd,&ps); GetClientRect(hwnd,&rect); DrawText(hdc,"Hello Window",-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER); EndPaint(hwnd,&ps); } void CApp::OnDestroy(){ PostQuitMessage(0); } CApp app; LRESULT CALLBACK WndProc(HWND hwnd,UINT iMsg,WPARAM wParam,LPARAM lParam) { switch(iMsg){ case WM_CREATE: app.OnCreate(); return 0; case WM_PAINT: app.OnDraw(); return 0; case WM_DESTROY: app.OnDestroy(); return 0; } return DefWindowProc(hwnd,iMsg,wParam,lParam); } int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR szCmdLine,int iCmdShow) { app.InitInstance(hInstance,szCmdLine,iCmdShow); app.Run(); return app.ExitInstance(); } |