Hello, I´m having some problem to convert my VB6 project to VB.NET

I dont understan how this "addressof" function should be in VB.NET

My VB6 code:

Declare Function MP4_ClientStart Lib "hikclient.dll" (pClientinfo As CLIENT_VIDEOINFO, ByVal abab As Long) As Long



Public Sub ReadDataCallBack(ByVal nPort As Long, pPacketBuffer As Byte, ByVal nPacketSize As Long)

  If Not bSaved_DVS Then
        bSaved_DVS = True
        HW_OpenStream hChannelHandle, pPacketBuffer, nPacketSize
    End If
        HW_InputData hChannelHandle, pPacketBuffer, nPacketSize

End Sub



nn1 = MP4_ClientStart(clientinfo, AddressOf ReadDataCallBack)