I have a button on my toolbar which allows a drop down context menu and works fine. The only problem I have is that the button and the drop down portion of the button work independantly from each other. Is there something I can do when the button portion is pressed to activate the dropdown portion?

I could just force the menu open, which I have, but I thought if I could just activate the dropdown portion as if someone had clicked it, that would be cool.

Thank you
Carl