Multi selected Records getting in grid

// IN form Gird select some records and click button. in button properties MultiSelect: YES
void clicked()
{
CustTable _CustTable;
;

super();

if(CustTable_ds.anyMarked())
{
_CustTable = CustTable_Ds.getFirst(1,false);
while(_CustTable)
{
info(_CustTable.AccountNum);
_CustTable = CustTable_Ds.getNext();

}
}
}