| Input Parameter | Significance |
| DtvLong idf | Field ID |
| char *xhf | Hyper_Field Userexit |
| Output Parameter | Significance |
| none | - |
| Return Code | Significance |
| 0 | OK |
| 1 | Null pointer |
| 2 | Function name not in Userexit list |
The Hyper_Field Userexit is called when the user clicks in the field.
Any necessary application parameters must be passed in *xba, together with the name of the Userexit. Passing an empty string ("")deletes a previous Userexit.
The function automatically invoke any set mask listener function.