CALL

This function branches to the routine defined on the CALL statement. Control is given to the statement following the routine name. Execution returns to the line following the CALL function when the RETURN function is detected. Up to 16 levels of CALL are supported.

The format of this function is CALL routine_name. For example, 
CALL SEND_ROUTINE
. . . . . . . . . 
EXIT
* 
:SEND_ROUTINE
. . . . . . . . . 
RETURN
Note: The colon that is the first character of the routine name is not used in the CALL function.