single click opn the ALV grid

Hi all ,

In the code below ,

FORM USER_COMMAND USING R_UCOMM LIKE SY-UCOMM

RS_SELFIELD TYPE SLIS_SELFIELD.

DATA: L_TA TYPE SY-TCODE VALUE 'SLIS_DUMMY'.

*

CASE R_UCOMM.

WHEN 'WAHL'. "menubutton

READ TABLE GT_OUTTAB INDEX RS_SELFIELD-TABINDEX. "cursorposit.

IF SY-SUBRC = 0.

SUBMIT SLIS_DUMMY WITH P_CARRID EQ GT_OUTTAB-CARRID

WITH P_CONNID EQ GT_OUTTAB-CONNID.

ENDIF.

CLEAR R_UCOMM.

WHEN '&IC1'. "doubleclick

READ TABLE GT_OUTTAB INTO GT_OUTTAB INDEX RS_SELFIELD-TABINDEX.

IF SY-SUBRC = 0.

SUBMIT SLIS_DUMMY WITH P_CARRID EQ GT_OUTTAB-CARRID

WITH P_CONNID EQ GT_OUTTAB-CONNID.

ENDIF.

CLEAR R_UCOMM.

ENDCASE.

ENDFORM.

this ( WHEN 'WAHL'.) is for "menubutton click.

& this ('&IC1'.) is for "doubleclick.

Anyone have any idea what should be the return command for single click in grid ?