| Input Parameters | Significance |
| DtvLong men | button area Id |
| char *selnam | button name |
| char *selusx | userexit |
| char *usxpar | userexit parameter |
| Output Parameters | Significance |
| none | - |
| Return Code | Significance |
| 0 | button can be added to button area |
| else | button cannot be added to button area |
This function calls the check function from the callback queue set via dal_but_set_sel_chk.
The function passes the return code of the check function which leaves the queue with different from 0 to the calling, button-area-creating function (e.g. dal_dmi_cre_but). If 0 is passed to the calling function or if no check function has been set, the button can be added to the button area.