AckCall
AckCall(UserId As Integer[, UserName As String[, bAck As Boolean]]) As Integer
Acknowledges the call for the user who has the ID <UserId> or whose name is <UserName> if UserId = 0.
Positive acknowledgment if <bAck> = TRUE (default), negative if not.
The function returns:
- 0: if no error
- 8: if the user is unknown