DtvLong dal_but_set_usx (idb, pos, usx)

Fills the button buffer of the button area with the userexit name of the button at the specified position.

Input Parameters Significance
DtvLong idb button area Id
DtvLong pos (logical) position of the button
char *usx userexit name

Output Parameters Significance
none -

Return Code Significance
0 all ok
1 wrong (logical) position
2 userexit does not exist
-1 zero pointer

The function automatically invoke any set Button listener function.