call activeX com method problem

[tianlang]

Dear Sir,
I meet a problem when I call a activeX com method, please give some guide, thank you.

my code:
EvoVoIPClient.OnAddUser=function(UserID,ChannelID)
{
trace("OnAddUser "+ChannelID+" "+UserID+" "+EvoVoIPClient.GetUser(UserID))
}

result is "OnAddUser 8 12 undefined", meaning EvoVoIPClient.GetUser(UserID) is undefined, it's need a object according manual.

the activeX manual is:
Function GetUser(nUserID As Long) As User

Parameters:
Name Type Optional Default Description
nUserID Long No - The user ID of the user to examine.

Method description:
Get the properties of a user, i.e. nickname, status, sound quality, etc.

the vb example code is:

Private Sub evoclient1_OnAddUser(ByVal nUserID As Long, ByVal nChannelID As Long)
Dim User As ConaitoLib.User
User = evoclient1.GetUser(nUserID)
AddStatus1Message ("User " & User.szNickName & " joined " & evoclient1.GetChannelPath(nChannelID))
End Sub