Using the MarkupLabel control you can create an image on the label from XAML, for example a Chart.

Here is some VB code that allows you to capture this image, with examples showing how to copy it to the Clipboard, Save to disk as a BMP, or Print to printer.

It uses API calls, and stores the captured image in a PictureBox (which is not visible).  There may be easier or better ways to do this, but this seems to work fine.

You need a Form with a MarkupLabel on it. Add three Command Buttons and a PictureBox.

There is just one Function, and some Declarations
 (uploads/20090906_195728_CaptureMarkupLa.zip).
And the following in the Button Click events:

Private Sub cmdCopy_Click()
  Set Picture1.Picture = CaptureMarkupToPicturebox
  Clipboard.Clear ' Clear Clipboard.
  Clipboard.SetData Picture1.Image, vbCFBitmap
End Sub

Private Sub cmdPrint_Click()
  Set Picture1.Picture = CaptureMarkupToPicturebox
  Printer.PaintPicture Picture1.Image, 100, 100 ', p.Width * Resize, p.Height * Resize
  Printer.EndDoc
End Sub

Private Sub cmdSave_Click()
  Set Picture1.Picture = CaptureMarkupToPicturebox
  SavePicture Picture1.Picture, "C:\mychart.bmp"
End Sub


Also set the PictureBox properties (eg in Form_Load)
   Picture1.AutoSize = True
   Picture1.Visible = False


I added this code to the excellent XamlCharts sample (which you can download from this Forum).
Now I can Print, Copy, or Save the resulting Chart images.

This works fine if the XAML is fully visible - but if it is partially or totally hidden (e.g. if the containing form is not visible) then it won't work, as it depends on BitBlt.  Putting it in a PrintPreview control doesn't work either, as you can't do anything but print from that control.

drimage wrote: the following are some codes about how to capture images in vb. Public Function TwainAcquireToRasterEdgeImageImage(ByVal HANDLE As Integer) As Integer ' Acquire a single image, from the currently selected Data Source to a DIB handle Public Function TwainAcquireToDib(ByVal HANDLE As IntPtr) As IntPtr ' Acquire a single image, from the currently selected Data Source to a file Public Function TwainAcquireToFile(ByVal FilePath As String, ByVal HANDLE As Integer) As RasterEdgeImageStatus

Hi, thanks for your sharing.
Becayse I am not so familiar with VB.NET processing, I focus more on capturing images using Twain Scanning in C#.NET. Can you offer some more tutorials about that?Thanks in advance.



Best regards,
Arron