DtvLong dal_but_fre_loc (idb, pos)

Unocks the button at the specified position in the button area passed.

Input Parameters Significance
DtvLong idb button area Id
DtvLong pos (logical) position of the button

Output Parameters Significance
none -

Return Code Significance
0 all ok
1 wrong (logical) position
-1 zero Id

The function automatically invoke any set Button listener function.