CALL TCODE FROM MENU BUTTONS IN ALV OOPS

Hi friends,

I have a report with ALV GRID display with oops . According to the requirement I have to cretae three buttons in the menu bar which will cal thre different transactions . Cn anyone tell me HOw to call the transaction from a report ? I tried to use set paramteer id but I am not able to get the output . If possible send me some sample code as well .

Thanks in advance .