Oracle Forms

Dears,
I fill list item according to user.

here my code:

          Cursor vc_found_group (vv_user Varchar2) Is
	  Select Count(A.Group_Id)
		  From Sec_Groups A 
		 Where Exists (Select 1 
  	                 From Sec_User_App_Groups B 
						        Where B.Group_Id = A.Group_Id 
						          and B.User_Id = vv_user);

 Begin
	:Login.Group_Id := Null;
	Open vc_found_group (:Global.User);
	Fetch vc_found_group Into vn_found;
	Close vc_found_group;
	If vn_found > 0 Then
		--Set_Item_Property('Login.Group_Id', Enabled, Property_True);		
		Go_Item('Login.Group_Id');
		vn_dummy := Populate_Group ('GROUPS');
    Populate_List ('GROUP_ID','GROUPS');
	Else
		Set_Item_Property('Login.Group_Id', Enabled, Property_False);
	End If;
	
	vn_dummy := Populate_Group ('GROUPS');
  Populate_List ('GROUP_ID','GROUPS');
 End;

and it filled well, but i need to get an intail value in the list ? hows that ?

I tried to change the list into TList and filled auto. but i shull choose the value to continue !!!