thanks for the responses, I'll try to put all the pieces together...

Thanks for that Hans. Lately I've considered writing my own--I'm writing an app with a couple of dialog boxes that could use something like that to navigate generic hierarchies. This should be a great place to start.

Look at ...\Microsoft Visual Studio\Common\IDE\IDE98\VJEXT.TLB With best wishes, Vita

With ImageList_Draw. Hm, "optimization" is not a good word. Older Windows did not support alpha at all and when the support was introduced, the functions were probably extended to handle it. But, I assume, due to compatibility issues someone decided to incorporate this "optimization" and when 32bit bitmap is used and it is completely transparent, it kicks in.

It seems that I have overlooked the LVM_SETTILEINFO message and thought that LVM_SETTILEVIEWINFO is all that is needed. Thanks for helping me, you have saved me a lot of time!

Thanks for the reply, I was hoping somebody already did this. Oh well.