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C-/C++-Quelltext

#include <windows.h> 

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; 

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, 
                    PSTR szCmdLine, int iCmdShow) 
{ 
     static TCHAR szAppName[] = TEXT ("HelloWin") ; 
     HWND         hwnd ; 
     MSG          msg ; 
     WNDCLASS     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 ; 

     if (!RegisterClass (&wndclass)) 
     {    // UNICODE-Compilierung ist die einzige realistische Fehlermöglichkeit 

          MessageBox (NULL, TEXT ("Programm arbeitet mit Unicode und setzt Windows NT voraus!"), 
                      szAppName, MB_ICONERROR) ; 
          return 0 ; 
     } 

      hwnd = CreateWindow (szAppName,                 // Name der Fensterklasse 

                  TEXT ("Das erste echte Programm"),  // Fenstertitel 

                  WS_OVERLAPPEDWINDOW,                // Fensterstil 

                  CW_USEDEFAULT,                      // X-Position des Fensters 

                  CW_USEDEFAULT,                      // Y-Position des Fensters 

                  CW_USEDEFAULT,                      // Fensterbreite 

                  CW_USEDEFAULT,                      // Fensterhöhe 

                  NULL,                               // übergeordnetes Fenster 

                  NULL,                               // Menü 

                  hInstance,                          // Programm-Kopiezähler (Programm-ID) 

                  NULL) ;                             // zusätzliche Parameter 

      
     ShowWindow (hwnd, iCmdShow) ; 
     UpdateWindow (hwnd) ; 
      
     while (GetMessage (&msg, NULL, 0, 0)) 
     { 
          TranslateMessage (&msg) ; 
          DispatchMessage (&msg) ; 
     } 
     return msg.wParam ; 
} 




LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) 
{ 
     HDC            hdc ; 
     HDC            hdcF; 
     PAINTSTRUCT    ps ; 
     RECT            rect ; 
     static int        sizeX, sizeY; 
      
     switch (message) 
     { 
     case WM_CREATE: 
          //PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ; 


         sizeX = 100; 
         sizeY = 100; 

          return 0 ; 
     case WM_PAINT: 
          hdc = BeginPaint (hwnd, &ps) ; 
          
          GetClientRect (hwnd, &rect) ; 

          // Das Fenster weiß malen 

          SelectObject (hdc, GetStockObject (WHITE_BRUSH)); 
          Rectangle(hdc, 0,0,rect.right, rect.bottom); 
          
          
          //DeleteObject (hdc); 

          
          DrawText (hdc, TEXT ("Hello, Windows 98!"), -1, &rect, 
                    DT_SINGLELINE | DT_CENTER | DT_VCENTER) ; 

          EndPaint (hwnd, &ps) ; 
          break; 

     case WM_NCCALCSIZE: 
          sizeX = ((NCCALCSIZE_PARAMS*)lParam)->rgrc[1].right; 
          sizeY = ((NCCALCSIZE_PARAMS*)lParam)->rgrc[1].bottom; 
          break; 
     case WM_NCACTIVATE: 
     case WM_NCPAINT: 
     case WM_ACTIVATE: 
     case WM_SETFOCUS: 
    

        
        hdcF = GetWindowDC(hwnd); 
            //GetDCEx(hwnd,  0, DCX_WINDOW  | 0x10000 | DCX_CLIPCHILDREN); 


        SelectObject (hdcF, GetStockObject (BLACK_BRUSH)); 
        Rectangle (hdcF, 0, 0, sizeX, sizeY) ; 


        //DeleteObject (hdcF); 

        // Paint into this DC 

        ReleaseDC(hwnd, hdcF); 
        //MessageBox(hwnd, L"HALLO", L"Hallo", 0); 

        return 0; 
          
     case WM_DESTROY: 
          PostQuitMessage (0) ; 
          return 0 ; 
     } 
     return DefWindowProc (hwnd, message, wParam, lParam) ; 
}