Modify GUI Status in Standard SAP Program

Hey All,

I would like to add some custom buttons to the toolbar of a standard SAP transaction.  I would like to do this dynamically in an Enhancement as opposed to getting an Access Key to modify the actual GUI Status. 

Is there any way to add a Toolbar item and assign a function code to the GUI Status at runtime?

This is not a Standard Selection Screen.

Any help is appreciated.

Thanks,

Aaron