I wonder if using a PNG with transparency as the watermark would make a difference.
Otherwise, perhaps trying to preprocess/apply a color matrix to the watermark image before .DrawImage with _SCREEN.System.Drawing.Bitmap.ApplyColorMatrix
There is an example here http://vfpimaging.blogspot.com/2007/07/watermark-your-reports-with-gdiplusx.html
HTH

>Does anybody know a way to apply a watermark to Foxcharts output?
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>In the Foxcharts Samples app there's a way to paint on the canvas using
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>

oFoxcharts.oGfx.DrawImage(_Screen.System.Drawing.Bitmap.FromVarbinary(FILETOSTR(lcFile)),5,5))

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>... but that puts the exact image in place, rather than a light watermark across the graph. Any ideas appreciated!