Public Shared Sub AddGdiDataToRegion( _
   ByVal image As RasterImage, _
   ByVal xform As RasterRegionXForm, _
   ByVal data() As Byte, _
   ByVal dataOffset As Integer, _
   ByVal combineMode As RasterRegionCombineMode _
) 

Dim image As RasterImage
Dim xform As RasterRegionXForm
Dim data() As Byte
Dim dataOffset As Integer
Dim combineMode As RasterRegionCombineMode
 
RasterRegionConverter.AddGdiDataToRegion(image, xform, data, dataOffset, combineMode)

public static void AddGdiDataToRegion( 
   RasterImage image,
   RasterRegionXForm xform,
   byte[] data,
   int dataOffset,
   RasterRegionCombineMode combineMode
)

public:
static void AddGdiDataToRegion( 
   RasterImage^ image,
   RasterRegionXForm^ xform,
   array<byte>^ data,
   int dataOffset,
   RasterRegionCombineMode combineMode
) 

Public Sub GdiRegionDataExample()
   Dim codecs As New RasterCodecs()

   Dim srcFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp"
   Dim destFileName1 As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_GdiRegionDataOriginal.bmp"
   Dim regionFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_GdiRegionData.bin"
   Dim destFileName2 As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_GdiRegionDataLoaded.bmp"

   RegionDataBefore(codecs, srcFileName, destFileName1, regionFileName)
   RegionDataAfter(codecs, srcFileName, destFileName2, regionFileName)

   codecs.Dispose()
End Sub

Private Sub RegionDataBefore(ByVal codecs As RasterCodecs, ByVal imageFileName As String, ByVal destFileName As String, ByVal regionFileName As String)
   ' Load the image
   Using image As RasterImage = codecs.Load(imageFileName)
      ' Add a polygon region to the image
      Dim x1 As Integer = image.ImageWidth \ 4
      Dim y1 As Integer = image.ImageHeight \ 4
      Dim x2 As Integer = image.ImageWidth \ 3
      Dim y2 As Integer = image.ImageHeight \ 3

      Dim pts() As LeadPoint = _
      { _
         New LeadPoint(x1, y1), _
         New LeadPoint(x2, y1), _
         New LeadPoint(x1, y2), _
         New LeadPoint(x2, y2) _
      }

      image.AddPolygonToRegion(Nothing, pts, LeadFillMode.Winding, RasterRegionCombineMode.Set)

      ' Draw something on the image
      Dim command As New InvertCommand()
      command.Run(image)

      ' Save the region and the image
      codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24)

      Dim data() As Byte = RasterRegionConverter.GetGdiRegionData(image, Nothing)
      Using fs As FileStream = File.Create(regionFileName)
         fs.Write(data, 0, data.Length)
      End Using
   End Using
End Sub

Private Sub RegionDataAfter(ByVal codecs As RasterCodecs, ByVal imageFileName As String, ByVal destFileName As String, ByVal regionFileName As String)
   ' Load the image
   Using image As RasterImage = codecs.Load(imageFileName)
      ' Load the region from the file and apply it to the image
      Dim data() As Byte

      Using fs As FileStream = File.OpenRead(regionFileName)
         ReDim data(CType(fs.Length, Integer) - 1)
         fs.Read(data, 0, data.Length)
      End Using

      RasterRegionConverter.AddGdiDataToRegion(image, Nothing, data, 0, RasterRegionCombineMode.Set)

      ' Draw something on the image
      Dim command As New InvertCommand()
      command.Run(image)

      ' Save the image
      codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24)
   End Using
End Sub

public void GdiRegionDataExample()
   {
      RasterCodecs codecs = new RasterCodecs();

      string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
      string destFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_GdiRegionDataOriginal.bmp");
      string regionFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_GdiRegionData.bin");
      string destFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_GdiRegionDataLoaded.bmp");

      RegionDataBefore(codecs, srcFileName, destFileName1, regionFileName);
      RegionDataAfter(codecs, srcFileName, destFileName2, regionFileName);

      codecs.Dispose();
   }

   private void RegionDataBefore(RasterCodecs codecs, string imageFileName, string destFileName, string regionFileName)
   {
      // Load the image
      using(RasterImage image = codecs.Load(imageFileName))
      {
         // Add a polygon region to the image
         int x1 = image.ImageWidth / 4;
         int y1 = image.ImageHeight / 4;
         int x2 = image.ImageWidth / 3;
         int y2 = image.ImageHeight / 3;

         LeadPoint[] pts =
         {
            new LeadPoint(x1, y1),
            new LeadPoint(x2, y1),
            new LeadPoint(x1, y2),
            new LeadPoint(x2, y2)
         };

         image.AddPolygonToRegion(null, pts, LeadFillMode.Winding, RasterRegionCombineMode.Set);

         // Draw something on the image
         InvertCommand command = new InvertCommand();
         command.Run(image);

         // Save the region and the image
         codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);

         byte[] data = RasterRegionConverter.GetGdiRegionData(image, null);
         using(FileStream fs = File.Create(regionFileName))
         {
            fs.Write(data, 0, data.Length);
         }
      }
   }

   private void RegionDataAfter(RasterCodecs codecs, string imageFileName, string destFileName, string regionFileName)
   {
      // Load the image
      using(RasterImage image = codecs.Load(imageFileName))
      {
         // Load the region from the file and apply it to the image
         byte[] data;

         using(FileStream fs = File.OpenRead(regionFileName))
         {
            data = new byte[fs.Length];
            fs.Read(data, 0, data.Length);
         }

         RasterRegionConverter.AddGdiDataToRegion(image, null, data, 0, RasterRegionCombineMode.Set);

         // Draw something on the image
         InvertCommand command = new InvertCommand();
         command.Run(image);

         // Save the image
         codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);
      }
   }

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