Hi,
Use Shortcut instead of popup and call it from RIGHTCLICK() event of the grid's textbox. For Example

DEFINE POPUP mypopup SHORTCUT RELATIVE FROM MROW(),MCOL()

DEFINE BAR 1 OF myPopup PROMPT "One"
DEFINE BAR 2 OF myPopup PROMPT "Two"

ON SELECTION POPUP myPopup DO myprg WITH BAR()
ACTIVATE POPUP mypopup
RELEASE POPUP myPopup

Hope it helps

Bye
Jayesh