SAP Function UPDATE_SCRSTACK - Update screen stack

Parameter	Reference	Type	Length	Default	Optional	Text
I_CURRENT_SCREEN	SYST-DYNNR	C	4			Screen number to add
I_OPERATION			0	'IN'	X	Add or delete a screen from stack

Functionality
This function deletes the screen number from the screen stack table orit inserts the screen number into the screen stack table.