> Hi!
>
> I've build a control that bases on the Signature Capture Sample from
> Microsoft(load bitmap, print on bitmap, paint on control). Works pretty
> fine.
>
> But now I want to copy a part of the displayed image to itself at
> another position. For example: Bitmap is ca. 100x100. I printed text on
> it at the upper left corner (for testing). Now I want to copy the text
> (or whatever has been printed there) to the lower left corner.
>
> Following the code parts from my project.
> EVERYTHING works but the "copy" command at the bottom of the code.
> But there is no error raised.
> So: What do I do wrong?
>
> Maybe someone's got a hint for me :-)
>
> Kind regards,
>
> Benjamin Lukner
>
> '----------------------------
>
> Class MyScreen
>
> Inherits Control
>
> Private _bmp As System.Drawing.Bitmap
> Private _graphics As System.Drawing.Graphics
>
> ' Load image from resource file embedded in project
> Public Sub New()
> _bmp = New Bitmap( _
> System.Reflection.Assembly.GetExecutingAssembly(). _
> GetManifestResourceStream( _
> System.Reflection.Assembly.GetExecutingAssembly.GetName.Name + _
> "." + "tcscreen.png"))
>
> ' Creating graphics object from image
> _graphics = Graphics.FromImage(_bmp)
>
> _graphics.DrawString("Test!", _
> New System.Drawing.Font("Courier New", 10, FontStyle.Regular), _
> New System.Drawing.SolidBrush(System.Drawing.Color.Red), 1, 1)
> End Sub
>
> Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
>
> 'START new part for copying
>
> Dim oRect As New System.Drawing.Rectangle
> oRect.FromLTRB(1, 1, 100, 50)
> _graphics.DrawImage(_bmp, 1, 51, oRect, GraphicsUnit.Pixel)
>
> 'END new part for copying
>
> e.Graphics.DrawImage(_bmp, 0, 0)
>
> End Sub
>
> End Class
>

Bob Powell [MVP] wrote:
> You can't copy an image from itself to itself. You'll have to copy it to a
> temporary bitmap first and then copy it back to itself again.

> Bob Powell [MVP] wrote:
> > You can't copy an image from itself to itself. You'll have to copy it to
a
> > temporary bitmap first and then copy it back to itself again.
>
> I'm sorry, but I can't manage it...
> I'm quite new to the compact framework so I'm afraid I need another
hint...
>
> I changed my code, but no errors and no effect...
> I seem to do it completely wrong:
>
> ' Moving 100x50 pixels from the upper left corner 100 pixels down
> Dim oRect As New System.Drawing.Rectangle
> oRect.FromLTRB(0, 0, 99, 49)
>
> Dim _bmpCache As New System.Drawing.Bitmap(100, 50)
> Dim _graphicsCache As System.Drawing.Graphics =
> Graphics.FromImage(_bmpCache)
>
> _graphicsCache.DrawImage(_bmp, 0, 0, oRect, GraphicsUnit.Pixel)
> _graphics.DrawImage(_bmpCache, 0, 100, oRect, GraphicsUnit.Pixel)
>
>
> Kind regards,
>
> Benjamin Lukner
>

Bob Powell [MVP] wrote:
> Try this...
>
> ' Moving 100x50 pixels from the upper left corner 100 pixels down
> Dim oRect As New System.Drawing.Rectangle
> oRect.FromLTRB(0, 0, 99, 49)