Hello, you OS/2 Gurus ;-)

This problem is driving me nuts: I see dozens of PM programs that do
fast text output using GPI procedures, namely GpiCharStringPosAt(),
WinFillRect() and GpiSetColor() / GpiSetBackColor(). Scrolling works
smoothly and fast (e.g. in text browsers or editors), almost as fast
as on a text screen under MS-DOS. I have tried everything to get a
similar performance, but no way. I am using a memory presentation
space, all writing is done in the associated bitmap and copied to
the real window on receipt of the WM_PAINT message. My window has
the CS_SYNCPAINT window style, and whenever the window must be
updated because the bitmap content has changed, the procedure
WinUpdateWindow () ist called. Either the painting on the bitmap
or the call to GpiBitBlt() (to copy the bitmap to the window)
takes too much time - it takes almost half a second to display the
whole window. I am using GpiCharStringPosAt() to paint the text,
and to get a better performance, I always paint one complete line
instead of drawing each character separately in different colors.
But event that should be possible - communication programs like
ZOC prove it.

So, can anybody tell me how this is done?

Tschuess,
  Steffen

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