bug#55208: 29.0.50; MS-Windows GUI selection dialogs and double-buffering

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

> w32_msg_pump doesn't handle WM_PAINT, so I'm not sure what you mean
> here.  Also, AFAIK w32_msg_pump runs in a separate thread, so is it
> safe to call BitBlt from that thread?

Sorry, I meant `w32_msg_pump'.  But it should be safe as long as the
painting is done inside the critical section, which protects all
modifications to the paint buffer (and its handle.)

> I do know, but the above issues bother me more, so I didn't yet try
> this.

I tried to explain above, thanks.