Low-Level DigitalPaint: Filling an Area

static L_VOID OnFill ( HWND hWnd, pPAINTHANDLE pPaint ) 
{ 
   HDC hDC ; 
   PAINTSHAPE shape ; 
   PAINTFILL fill ; 
   RECT rcShape ; 
   RECT rcDCExtents ; 
    
   // Get device context to draw on 
   hDC = GetDC ( hWnd ) ; 
   // Set the required shape properties 
   shape.nSize  = sizeof ( PAINTSHAPE ) ; 
   shape.dwMask = PSF_BORDERWIDTH     | 
   PSF_BORDERCOLOR     | 
   PSF_BACKGROUNDCOLOR ; 
    
   shape.nBorderWidth = 10 ; 
   shape.crBorderColor = RGB ( 255, 0, 0 ) ; 
   shape.crBackgroundColor = RGB ( 255, 0, 0 ) ; 
   // Set the new shape properties 
   L_PntSetProperty ( pPaint, PAINT_GROUP_SHAPE, &shape ) ; 
   // Set the coordinates with respect to the DC dimensions 
   SetRect ( &rcShape, 10, 10, 60, 60 ) ; 
   // Use the current shape properties to draw an ellipse to the DC (hDC) 
   L_PntDrawShapeEllipse ( pPaint, hDC, &rcShape ) ; 
   SetRect ( &rcShape, 100, 10, 150, 60 ) ; 
   L_PntDrawShapeEllipse ( pPaint, hDC, &rcShape ) ; 
   SetRect ( &rcShape, 60, 60, 95, 95 ) ; 
   L_PntDrawShapeRectangle ( pPaint, hDC, &rcShape ) ; 
   SetRect ( &rcShape, 10, 100, 60, 150 ) ; 
   L_PntDrawShapeEllipse ( pPaint, hDC, &rcShape ) ; 
   SetRect ( &rcShape, 100, 100, 150, 150 ) ; 
   L_PntDrawShapeEllipse ( pPaint, hDC, &rcShape ) ; 
   // Get the destination DC dimensions 
   GetClientRect ( hWnd, &rcDCExtents ) ; 
   // Set the toolkit user DC extents 
   L_PntSetDCExtents ( pPaint, &rcDCExtents ) ; 
   // Set the required fill properties 
   fill.nSize  = sizeof ( PAINTFILL ) ; 
   fill.dwMask = PFF_STYLE ; 
   fill.nStyle = PAINT_FILL_STYLE_GRADIENT ; 
   // Set the new fill properties 
   L_PntSetProperty ( pPaint, PAINT_GROUP_FILL, &fill ) ; 
   // Fill the target area 
   L_PntFillColorReplace ( pPaint, hDC, RGB ( 255, 0, 0 ) ) ; 
   // Release the device context 
   ReleaseDC ( hWnd, hDC ) ; 
} 

case IDM_PAINTTEST_FILL:   
               OnFill ( hWnd, pPaint ) ;   
               return 0L ;