| Input Parameters | Significance |
| DtvLong idf | field Id |
| char *fmt | format string of the field |
| Output Parameters | Significance |
| no | - |
| Return Code | Significance |
| 0 | no error |
| 1 | zero pointer |
The format string applies to fields of the types integer, float, and money. If the irst character in the string is a minus, the field content will be positioned flush-left. A numerical character describes the number of digits after the decimal point for field of the type float and money.
The function automatically invoke any set mask listener function.