OnMove and Flickering in VB .NET

[crafuse]

Hello,

I have an application where I have a main window and several other
windows owned by it. The owned windows are derived from a class that
overrides the OnMove method so that thay automatically snap to the
right side of the main window when they get close enough.

My problem is that I move the owned windows in the OnMove method. This
causes horrible flickering since the underlying class is painting the
form to the new position and then the OnMove event is fired and my code
moves it back.

How can you take over the painting of a form (frame and all) so that I
may disable painting while it is snapped?


Chris

 

[Chris Dunaway]

Have you tried turning on double buffering? Check out this article:

http://www.bobpowell.net/doublebuffer.htm

 

[crafuse]

Yes I have. I set the ControlStyles.DoubleBuffering to True in the
form.

It would seem that the form is responding to the drag, repainting
itself in the new location, OnMove gets called and then my code sets
DesktopBounds to aligned position. The result is an extremely anoying
flicker.

I've also since overrided the WndProc function and intercepted the
WM_MOVE message. When WM_MOVE is received and my window is snapped to
the owner window I don't call anything. Otherwise I call
MyBase.WndProc. However, OnMove still is somehow called.

 

[crafuse]

I have found the solution to my problem. The exact situation was solved
in this posting:

http://groups.google.ca/group/micro...windows+winamp&rnum=24&hl=en#f91885d3514b7fb5

watch for URL clipping.


Thanks Chris.



Chris