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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 ("Klassenname");
   HWND         hwnd;
   MSG          msg;
   WNDCLASSEX   wndclassex = {0};

   wndclassex.cbSize        = sizeof(WNDCLASSEX);
   wndclassex.style         = CS_HREDRAW | CS_VREDRAW;
   wndclassex.lpfnWndProc   = WndProc;
   wndclassex.cbClsExtra    = 0;
   wndclassex.cbWndExtra    = 0;
   wndclassex.hInstance     = hInstance;
   wndclassex.hIcon         = LoadIcon (NULL, IDI_APPLICATION);
   wndclassex.hCursor       = LoadCursor (NULL, IDC_ARROW);
   wndclassex.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH);
   wndclassex.lpszMenuName  = NULL;
   wndclassex.lpszClassName = szAppName;
   wndclassex.hIconSm       = wndclassex.hIcon;

   if (!RegisterClassEx (&wndclassex))
   {
      MessageBox (NULL, TEXT ("RegisterClassEx fehlgeschlagen!"),
                  szAppName, MB_ICONERROR);
      return 0;
   }

   hwnd = CreateWindowEx (WS_EX_OVERLAPPEDWINDOW, // erweiterter Fensterstil

                  szAppName, // Name der Fensterklasse

                  TEXT ("Fenstertitel"), // 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;
}

// Die Hauptnachrichtenschleife

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
   HDC hdc;
   PAINTSTRUCT ps;

   switch (message)
   {
   case WM_CREATE:
      return (0);

   case WM_PAINT:
      hdc = BeginPaint (hwnd, &ps);
      TextOut (hdc, 0, 0, "Hallo, ich bin ein Fenster!", 27);
      EndPaint (hwnd, &ps);
      return (0);

   case WM_DESTROY:
      PostQuitMessage (0);
      return (0);
   }

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