Hi All I've attached a patch which should give support for using wxGCDC. It is not finished or watertight, but it does work on my windows machine so i thought now was a good point to send it round to check for any platform dependant differences, so if someone could try it on a linux machine or a Mac that would be good. i think I might have broken the AGG backend with this patch but I'll fix that later if needed. The only real hitch i came accross was that setting clipping regions are not consistent between wxGCDC and other DCs. I think this might have been cleared up in more recent releases and in fact the clipping method used in Plplot has been depreciated. Because of this some flag is needed to indicate whether a wxDC or a wxGCDC is being used. We therefore have the following overarching changes: Setting backend=2 now uses the wxDC backend, but uses a wxGCDC. I've added a backend=3 option which is an indicator that the user is going to pass in a wxGCDC using plcmd(PLESC_DEVINIT, gcdc) From the command line setting backend=3 should give the same results as backend=2, but I must confess I haven't tested it. We now have subpixel accuracy on points, for backends 2 and 3 which you should be able to see if you draw a horizontal line of 1 pixel width - if it lies on a pixel boundary it will have grey edges. Please let me know how any tests you do go. Phil
testGCDC.patch
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