🚀 go-pugleaf

I need to find a way to disable and re-enable screen updates in order
to save processing time.  For example, I am using GPI calls to clear
a small area of the screen, draw a string of text, and display a
bitmap.   I'd like to disable screen updates before all three operations,
and enable them after all three operations.

This is possible using WinEnableWindowUpdate(), but it is necessary
to call WinShowWindow() after re-enabling updates.  The problem with
WinShowWindow() is that it causes the entire window to be repainted,
not just the invalid region.

I tried trapping the WM_SHOW message, but couldn't get it to work.

Is there a way to do what I need to do?  Because of our design,
the window is 640 x 480 pixels.  We have a kind of homemade graphics
client/server system, so it would require an overhaul to make these
small areas individual windows.

Thanks for any help.  If possible, please mail responses to me at:
kbennett@access.digex.net.

- Keith
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Keith Bennett                            Bennett Business Solutions, Inc.
C++/C Software Development               1605 Ingram Terrace
kbennett@access.digex.net                Silver Spring, MD USA 20906-5932