let me explain my question a little bit; i made a program that checks my mail every x minutes and show me in my systemtray how much emails exists in my inbox. almost the notifyicon have to be my icon with the zero :P, but sometimes i seemed to be important and got an email, so the notifyicon have to change in the icon with a one. In vb6 I have made icons with 1 till 9 and a > (more) and putted them all to pictureboxes. Worked fine, but .net don't want them.