GetWindowExt

[Space Ace]

Does anyone know how GetWindowExt function works? I've written in my View class: (in OnInitialUpdate) CSize sizeTotal(1000, 1000); SetScrollSizes(MM_LOMETRIC, sizeTotal); then somewhere in the program I write CClientDC dc(this); OnPrepareDC(&dc); CSize size = dc.GetWindowExt(); And size.cy equals to -254! Does anyone know the clue?

[Chris Losinger]

Space Ace wrote: then somewhere in the program where in the program? are you calling it before the window has been shown ? -c

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Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten

image effects!

[Space Ace]

Chris Losinger wrote: where in the program? Well, I'm calling it in OnLButtonDown (just as a test). By this time the window is definitely already shown.

[Chris Losinger]

what happens if you don't call OnPrepareDC ? -c

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Conservative: One who admires radicals centuries after they're dead. -- Leo C. Rosten

image effects!

[Space Ace]

Chris Losinger wrote: what happens if you don't call OnPrepareDC ? This way it doesn't work either. In this case it returns 1 which is obvious: if we don't call OnPrepareDC the map mode is not set.