| Input Parameters | Significance |
| DtvLong dfg | 0 = copy without data 1 = copy with data (like dal_mas_cop_mas) |
| DtvLong idm | Id of source mask |
| char *dsc | name of target mask |
| Output Parameters | Significance |
| none | - |
| Return Code | Significance |
| value | Id of mask copy |
This function is automatically invoked by dal_mas_dup_mas with dfg=1.