How to paint the CTreeCtrl transparently?

[Martial Spirit]

:confused:I'm curious of how to paint the CTreeCtrl transparently, this means how to create a CTreeCtrl in existed view without cover its content. just like CATIA's GUI, but I'm frustrated, I have no idea. Best Regards

[Shog9 0]

The tree control does not draw transparently. If you wish to make it appear otherwise, there are two feasible ways of doing so: 1) draw it yourself, and do it transparently. The control has a rich custom drawing API, and this is actually not too hard. The downside is, there's the possibility you'll forget to draw something correctly in an uncommon situation, or a new (or old) version of the tree will draw itself in a significantly different manner, leaving your custom-draw code producing very odd results. 2) let the tree draw itself onto an in-memory bitmap, then draw this bitmap to the screen while masking out the background color. This can be slower, and you really have to work to handle all the places where the tree tries to draw itself (hint: disable animated expand/collapse), but should be fairly bullet-proof once you're done with all that.

You must be careful in the forest Broken glass and rusty nails If you're to bring back something for us I have bullets for sale...

[Martial Spirit]

I'll try to fullfill it, thanks for your helpful ideas. Best Regards