Can c++ operate on c# window handle?

[violin wang]

I use c# to build UI for my application and write a
unmanaged c++ dll which use DirectShow to play video.I
want the video image to display in a PictureBox on the
UI.Can I pass the handle of PictureBox to DirectShow as
video windows?If not, how can I reach my goal?

regards
violin

 

[Chris Taylor]

Hi,

If you do this, beware that invoking certain methods and properties will
actually cause the underlying window to be destroyed and recreated thus
rendering your previous handle invalid. To detect this situation, you can
handle the HandleCreated and HandleDestroyed events for the control.
Ideally, you should avoid adjusting properties that will result in the
window being recreated. The reason for this, is that some of the underlying
windows styles for instance can only be applied when the window is created,
so to hide this complexity the .NET framework just destroys and recreates a
new window with the required styles transferring all relevant properties etc
to the newly created window.

Hope this helps

Chris Taylor