Public Overloads Function ChangeToHBitmap() As IntPtr

Visual Basic (Usage)	Copy Code
Dim instance As RasterImage Dim value As IntPtr   value = instance.ChangeToHBitmap()

public IntPtr ChangeToHBitmap()

public:
IntPtr ChangeToHBitmap(); 

Return Value

This example loads a RasterImage, changes it to a DDB and then changes it back to RasterImage.

Visual Basic

Copy Code

Public Sub ChangeToHBitmapExample()    RasterCodecs.Startup()    Dim codecs As New RasterCodecs()    ' Load an image    Dim image As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp", 24, CodecsLoadByteOrder.BgrOrGray, 1, 1)    ' Change to DDB    Dim hbitmap As IntPtr = image.ChangeToHBitmap()    ' Dispose the image since it is unusable now    image.Dispose()    ' Change the DDB to a new LEAD RasterImage    image = RasterImage.ChangeFromHBitmap(hbitmap, IntPtr.Zero)    ' Save this image back to disk    codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "Image1_ChangeToHBitmap.bmp", RasterImageFormat.Bmp, 24)    image.Dispose()    ' Clean up    DeleteObject(hbitmap)    codecs.Dispose()    RasterCodecs.Shutdown() End Sub

C#

Copy Code

public void ChangeToHBitmapExample()  {     RasterCodecs.Startup();     RasterCodecs codecs = new RasterCodecs();       // Load an image     RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp", 24, CodecsLoadByteOrder.BgrOrGray, 1, 1);       // Change to DDB     IntPtr hbitmap = image.ChangeToHBitmap();       // Dispose the image since it is unusable now     image.Dispose();       // Change the DDB to a new LEAD RasterImage     image = RasterImage.ChangeFromHBitmap(hbitmap, IntPtr.Zero);       // Save this image back to disk     codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "Image1_ChangeToHBitmap.bmp", RasterImageFormat.Bmp, 24);       image.Dispose();       // Clean up     DeleteObject(hbitmap);     codecs.Dispose();     RasterCodecs.Shutdown();  }

This method results in only one copy of the image, and it invalidates this RasterImage object. You must call Dispose after calling this method.

For more information on DDBs and DIBs, refer to Using DIBs, DDBs, and the Clipboard.

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference