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Thanks George, I can do the bulk of the clipping in my application so that only objects that will fill the current view port (or enter it on one of the edges) will be drawn and in doing so not pass the 2200 pixel barrier. I hope Microsoft improve on the second cut of VB with documentation on view ports and the techniques for easy scrolling. While I am on the topic of scrolling my application was attempting to repaint a picture with an X,Y offset so that I can view various parts of the whole picture. Much in the same way that you would view various parts of a drawing package such as Designer. I assume that in such packages they BitBlt the picture to apply the actual scroll then mark the "exposed" area as a Rectangle/Region (I really don't know the difference between these either as both seem to have X1,Y1 – X2,Y2 co-ordinates) to be refreshed only. If anybody could enlighten me on this I would be most appreciatine. I know that there are a number of books now coming onto the market for VB but as yet none of them have reached Australia (some due Nov). Can anybody recomend a book that goes well beyond the basics – ie. not a beginners book but Advanced Techniques! I am interested at this stage in graphics techniqyes such as in a drawing package as this is the foundation of my application – which by the way is driving a model railway. There is 1 Reply.