>Value is not an event to be bound, Bind Click instead
>BINDEVENT(.chk1,"Click",thisform,"cnt_sel",1)

Borislav,
A property is allowed to be as the bound "cEvent".i have many successful usage. My target is when a value of checkbox control takes any change,
not only triggered by Click event,then refresh the counter for .T..
However, as the checkbox is a contained control in a column of grid,the
effect using bindevent() here is out of my reckon.