Gdiobject

 

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM WParam,LPARAM lParam)
{

 HDC hdc;
 PAINTSTRUCT ps;
 HBRUSH Mybrush,Oldbrush;

 switch(iMessage){
 case WM_PAINT:
  hdc = BeginPaint(hWnd,&ps);
  Mybrush = (HBRUSH)GetStockObject(LTGRAY_BRUSH);
  Oldbrush = (HBRUSH)SelectObject(hdc,Mybrush);
  Rectangle(hdc,50,50,300,200);
  SelectObject(hdc,Oldbrush);
  EndPaint(hWnd,&ps);
  return 0;
 
 case WM_DESTROY:
  PostQuitMessage(0);
  return 0;
   
 }
 

return(DefWindowProc(hWnd,iMessage,WParam,lParam));
}
//Mybrush = (HBRUSH)GetStockObject(LTGRAY_BRUSH);  LTGRAY_BRUSH를 쓰겠다고 선정.
// Oldbrush = (HBRUSH)SelectObject(hdc,Mybrush); Mybrush에 저장되어 있는 brush를 사용하고
                                                                            이전의 brush를 return 값으로 받아서 oldbrush에 저장.
// SelectObject(hdc,Oldbrush); 원래의(windows default 값으로 리소스를 반환시킴)