Events triggered by the mouse
Each of the platforms supported by PowerBuilder traditionally
has a different type of mouse with a different number of buttons.
Predefined mouse events
Controls that you can click have predefined events like Clicked, DoubleClicked,
and RButtonDown. Users can trigger these events by clicking the
appropriate mouse button.
Avoiding unsupported mouse buttons
PowerBuilder also supports user events for the middle mouse
button. If you plan to deploy your application on Windows, you should
not define these user events and write scripts for them unless you
know your users all have a mouse that supports events for a third