| Input Parameters | Significance |
| char flg |
locking flag 0 = unlock 1 = lock |
| Output Parameters | Significance |
| none | - |
| Return Code | Significance |
| 0 | all ok |
| -1 | no graphical interface initialized |
If you lock the communication via dal_gfi_set_loc (1), no actions are transmitted from the server to the graphical client.
This function call can be nested.
If you lock the communication to the graphical client via dal_gfi_set_loc (1) several times, you will have to unlock it using dal_gfi_set_loc (0) just as often. to allow communication again.