Overloads Public Shared Sub Paint( _
   ByVal image As RasterImage, _
   ByVal hdc As IntPtr, _
   ByVal srcRect As LeadRect, _
   ByVal destRect As LeadRect, _
   ByVal properties As RasterPaintProperties _
) 

Dim image As RasterImage
Dim hdc As IntPtr
Dim srcRect As LeadRect
Dim destRect As LeadRect
Dim properties As RasterPaintProperties
 
RasterImagePainter.Paint(image, hdc, srcRect, destRect, properties)

public static void Paint( 
   RasterImage image,
   IntPtr hdc,
   LeadRect srcRect,
   LeadRect destRect,
   RasterPaintProperties properties
)

public:
static void Paint( 
   RasterImage^ image,
   IntPtr hdc,
   LeadRect srcRect,
   LeadRect destRect,
   RasterPaintProperties properties
) 

Public Sub PaintDCExample()
      Dim f As New PaintDCForm()
      f.ShowDialog()
   End Sub

   Class PaintDCForm
      Inherits Form
      Private image As RasterImage
      Private props As RasterPaintProperties

      Public Sub New()
         ' Load the image
         Dim codecs As New RasterCodecs()

         Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif")
         image = codecs.Load(srcFileName)

         Text = "Normal - doubleclick to change."
         props = RasterPaintProperties.Default
         props.PaintDisplayMode = RasterPaintDisplayModeFlags.None
         props.UsePaintPalette = True
      End Sub

      Protected Overrides Sub Dispose(ByVal disposing As Boolean)
         ' Clean up
         If disposing Then
            image.Dispose()
         End If

         MyBase.Dispose(disposing)
      End Sub

      Protected Overrides Sub OnDoubleClick(ByVal e As EventArgs)
         If (props.PaintDisplayMode And RasterPaintDisplayModeFlags.ScaleToGray) = RasterPaintDisplayModeFlags.ScaleToGray Then
            Text = "Normal - doubleclick to change."
            props.PaintDisplayMode = props.PaintDisplayMode And Not RasterPaintDisplayModeFlags.ScaleToGray
         Else
            Text = "ScaleToGray - doubleclick to change."
            props.PaintDisplayMode = props.PaintDisplayMode Or RasterPaintDisplayModeFlags.ScaleToGray
         End If

         Invalidate()

         MyBase.OnDoubleClick(e)
      End Sub

      Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
         ' Draw the image fit and center on this form
         Dim destRect As LeadRect = LeadRect.FromLTRB(ClientRectangle.Left, ClientRectangle.Top, ClientRectangle.Right, ClientRectangle.Bottom)
         destRect = RasterImage.CalculatePaintModeRectangle( _
            image.ImageWidth, _
            image.ImageHeight, _
            destRect, _
            RasterPaintSizeMode.Fit, _
            RasterPaintAlignMode.Center, _
            RasterPaintAlignMode.Center)

         Dim hdc As IntPtr = e.Graphics.GetHdc()
         RasterImagePainter.Paint(image, hdc, LeadRect.Empty, destRect, props)
         e.Graphics.ReleaseHdc(hdc)

         MyBase.OnPaint(e)
      End Sub
   End Class

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void PaintDCExample()
   {
      PaintDCForm f = new PaintDCForm();
      f.ShowDialog();
   }

   class PaintDCForm : Form
   {
      private RasterImage image;
      private RasterPaintProperties props;

      public PaintDCForm()
      {
         // Load the image
         RasterCodecs codecs = new RasterCodecs();

         string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif");
         image = codecs.Load(srcFileName);

         Text = "Normal - doubleclick to change.";
         props = RasterPaintProperties.Default;
         props.PaintDisplayMode = RasterPaintDisplayModeFlags.None;
         props.UsePaintPalette = true;
      }

      protected override void Dispose(bool disposing)
      {
         // Clean up
         if(disposing)
         {
            image.Dispose();
         }

         base.Dispose(disposing);
      }

      protected override void OnDoubleClick(EventArgs e)
      {
         if((props.PaintDisplayMode & RasterPaintDisplayModeFlags.ScaleToGray) == RasterPaintDisplayModeFlags.ScaleToGray)
         {
            Text = "Normal - doubleclick to change.";
            props.PaintDisplayMode &= ~RasterPaintDisplayModeFlags.ScaleToGray;
         }
         else
         {
            Text = "ScaleToGray - doubleclick to change.";
            props.PaintDisplayMode |= RasterPaintDisplayModeFlags.ScaleToGray;
         }

         Invalidate();

         base.OnDoubleClick(e);
      }

      protected override void OnPaint(PaintEventArgs e)
      {
         // Draw the image fit and center on this form
         LeadRect destRect = LeadRect.FromLTRB(ClientRectangle.Left, ClientRectangle.Top, ClientRectangle.Right, ClientRectangle.Bottom);
         destRect = RasterImage.CalculatePaintModeRectangle(
            image.ImageWidth,
            image.ImageHeight,
            destRect,
            RasterPaintSizeMode.Fit,
            RasterPaintAlignMode.Center,
            RasterPaintAlignMode.Center);

         IntPtr hdc = e.Graphics.GetHdc();
         RasterImagePainter.Paint(image, hdc, LeadRect.Empty, destRect, props);
         e.Graphics.ReleaseHdc(hdc);

         base.OnPaint(e);
      }
   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}