Re: Forcing a screen repaint??

"AliR \(VC++ MVP\)" <AliR@online.nospam>
Wed, 02 May 2007 16:48:00 GMT
It does under Windows XP. I tested it by putting a break point in a
program's OnPaint, and calling RedrawWindow(NULL,...); from another program.
The break point got hit, and I could also see the desktop icons flash.

Make sure you pass RedrawWindow the RDW_ALLCHILDREN flag.


"Peter Olcott" <> wrote in message

"AliR (VC++ MVP)" <AliR@online.nospam> wrote in message

I think the control panel app does this.


because you see all the windows flash for an instant.

The code that your provided does not appear to make every desktop icon
flash like when font smoothing is changed through the control panel. I
need it to provide exactly the same result as that of the change to the
control panel.


"David Ching" <> wrote in message

"Joseph M. Newcomer" <> wrote in message

Given that you are changing the ClearType setting, I would have
expected the system to
send out a WM_DISPLAYCHANGE notification, and this should cause most
windows to redraw

I'm not sure how this works, because it's not enough to
invalidate/redraw each window. The app must know to recreate cached
fonts so that they get the cleartype ones. (Apps can explicitly declare
to get non-cleartype fonts). Yet when the user enables ClearType with
the Control Panel, the apps seem to do fine.

-- David

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