| Input Parameters | Significance |
| DtvLong idf | field Id |
| DtvLong vid |
video attribute of the field: 0 = bold (default) 1 = normal 2 = reverse 3 = dim 4 = blink 5 = underline |
| Output Parameters | Significance |
| no | - |
| Return Code | Significance |
| 0 | no error |
| 1 | wrong digit |
The function automatically invoke any set mask listener function.