programatically select a list box item

[Gober]

we programatically created the list box and are trying to programatically set a default selected item. We have tried these three things and can not achieve our objective:       
SetCtrlIndex (ch1Tab, CH1_BOARDS1, 0);
SetCtrlVal (ch1Tab, CH1_BOARDS1, 1);
SetCtrlAttribute (ch1Tab, CH1_BOARDS1, 0);

[RobertoBozzolo]

Try with
SetCtrlAttribute (tmpH, ctrl, ATTR_DFLT_VALUE, 0);

Roberto