| Input Parameters | Significance |
| DtvLong idb | button area Id |
| DtvLong pos | (logical) position of the button |
| Output Parameters | Significance |
| none | - |
| Return Code | Significance |
| 0 | all ok |
| 1 | wrong (logical) position |
| -1 | zero Id |
The function automatically invoke any set Button listener function.