Catching right-clicks on a button control

Hi!

I would like to catch right-clicks on a Button control. For this I check the button's ba.eventMod for a right click. It seems that the Button control does not see the right-click, because I always get ba.eventMod = 0 if I right-click on a button control instead of ba.eventMod = 16. However, it sees for example the Ctrl-click (ba.eventMod = 1+8).

I did not find anywhere stated that the Button control does not catch right-clicks, so is this a feature or a bug?

I am using IGOR Pro 6.34 on WindowsXP.

Thanks!

Gregor