Returns the line pointer, or Line Number of the line containing the cursor. If the cursor is not on a valid line in the text area, then 0 (zero) will be returned.
RC will always be 0 and Msg$ will be "" (Null)
Notes
This value could be saved and used, for example, to return the screen display back to it's original position using the Set_Csr_Pos if macro processing had caused it to be altered.