main.cpp

#include <windows.h>

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
  MSG msg          = {0};
  WNDCLASS wc      = {0}; 
  wc.lpfnWndProc   = WndProc;
  wc.hInstance     = hInstance;
  wc.hbrBackground = (HBRUSH)(COLOR_BACKGROUND);
  wc.lpszClassName = L"minwindowsapp";
  if( !RegisterClass(&wc) )
    return 1;

  if( !CreateWindow(wc.lpszClassName,
                   L"Minimal Windows Application",
                   WS_OVERLAPPEDWINDOW|WS_VISIBLE,
                   0,0,640,480,0,0,hInstance,NULL))
    return 2;

  while( GetMessage( &msg, NULL, 0, 0 ) > 0 )
    DispatchMessage( &msg );

  return 0;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
  switch(message)
  {
    case WM_CLOSE:
      PostQuitMessage(0);
      break;
    default:
      return DefWindowProc(hWnd, message, wParam, lParam);
  }
 
  return 0;
}