Low-Level DigitalPaint: Creating a Region

static L_VOID OnRegion ( HWND hWnd, pPAINTHANDLE pPaint ) 
{ 
   HDC hDC ; 
   PAINTREGION region ; 
   RECT rcRegion ; 
   HRGN hRgn ; 
   region.nSize = sizeof ( PAINTREGION ) ; 
   region.dwMask = PRF_ROUNDRECTELLIPSEWIDTH | 
   PRF_ROUNDRECTELLIPSEHEIGHT ; 
   region.nRoundRectEllipseWidth = 40 ; 
   region.nRoundRectEllipseHeight = 40 ; 
   // Set the new region properties 
   L_PntSetProperty ( pPaint, PAINT_GROUP_REGION, &region ) ; 
   // Get the device context 
   hDC = GetDC ( hWnd ) ; 
   // Set the coordinates with respect to the DC dimensions 
   SetRect ( &rcRegion, 10, 10, 200, 200 ) ; 
   // Use the current region properties and the current painting 
   // transformations to create a rouned rectangle region 
   L_PntRegionRoundRect ( pPaint, hDC, &rcRegion, &hRgn ) ; 
   // View the resulted region 
   FrameRgn ( hDC, hRgn, (HBRUSH)GetStockObject ( BLACK_BRUSH ), 1, 1 ) ; 
    
   // Delete the region 
   DeleteObject ( hRgn ) ; 
   // Release the device context 
   ReleaseDC ( hWnd, hDC ) ; 
} 

case IDM_PAINTTEST_REGION:   
OnRegion ( hWnd, pPaint ) ;   
return 0L ;