variable in command line

Hi All,

Can we include a variable in a command line( BOX) .

my requirement is to display line items in a main window.i want to display items in a box that extends dynamically. at end of line items i need to dispaly the total box.

even if there are no line items present then i need to display total box.

can we give a variable in an include command i.e giving YPOS &gv_lines& MM .

can anyone suggest me in this issue.

Regards,

Sre