using own dll

[BSA01]

I am writing my own DLL for playing mp3 wiht DirectX.

I'm wondering is this correct, because I have problem with this :

Public Property Let LoadFile(ByVal File As String, Level As Integer)
    DirectShow_Load_Media File
    DirectShow_Volume Level
    DirectShow_Balance 0
    DirectShow_Speed 100
    DirectShow_Set_Position 0, 0, 0, 0
End Property

Public Property Let UcitajFile(ByVal File As String, Glasnoca As Integer)
    DirectShow_Load_Media File
    DirectShow_Volume Glasnoca
    DirectShow_Balance 0
    DirectShow_Speed 100
    DirectShow_Set_Position 0, 0, 0, 0
End Property

Public Property Let SetLevel(ByVal Level As Integer)
  DirectShow_Volume Level
End Property

Public Property Let RunFile(ByVal State As Boolean)
  On Error Resume Next
  If State Then
    DirectShow_Play
  Else
    DirectShow_Stop
  End If
End Property