How do i click on a ToolBarButtons which are on the toolbar

Hello,

I am having a tool bar on which there are few buttons, I am writing an automation script to click on the Toolbarbuttons, on click of the toolbar button a dialog pops up.

But here i am not having any eventhandler so I am not knowing how to do say click on the toolbarbuttons they dont have any properties like that also.

Any help

Thanks