Thanks fro the response. This does save the file as a .PNG, but it makes it an image with a filesize 10x larger than the original. It turns a 50k jpg into a 500k png and a 5k gif into a 50k png. Any idea why?

Dim SourceBitmap As Bitmap =  New Bitmap(Server.MapPath(savePath & "original." & c))
	Dim TargetBitmap As Bitmap =  New Bitmap(NewWidth,NewHeight)
	Dim g As Graphics =  Graphics.FromImage(TargetBitmap)
 



	' set Drawing Quality
 	g.InterpolationMode = InterpolationMode.HighQualityBicubic
 	g.SmoothingMode = SmoothingMode.HighQuality
	g.Clear(Color.White)
 	Dim compressionRectangle As Rectangle =  New Rectangle(0,0,NewWidth,NewHeight)
 	g.DrawImage(SourceBitmap, compressionRectangle)
	g.DrawString("TEST PNG",New Font("Verdana Bold", 10),New SolidBrush(Color.SteelBlue),10,10)
               Response.ContentType = "image/png"
 	' decide new path and save the image
 	Dim NewImagePath As String =  System.IO.Path.GetFileNameWithoutExtension(OriginalImageName) + ".png"


'dim memStream As New MemoryStream((Request.MapPath("/images/TESTPNG/")  &"LARGE.png"))
	   TargetBitmap.Save((Request.MapPath("\images\TESTPNG\")  &"LRG.png"),ImageFormat.Png)
'TargetBitmap.Save(memStream,ImageFormat.Png)
'memStream.WriteTo(response.outputstream)
'tidy up
TargetBitmap.dispose()

Thanks