VS 2010 Problem with my Skype tool (Mute button to mute skype).

Hi everyone.

I created a tool to register a hotkey (My keyboard's mute button) so when I press it, it will mute the sound (By default it does it) but also
mute my skype, so I created this (Full project's code):

Code:

Imports System.Runtime.InteropServices

Imports SKYPE4COMLib



Public Class Form1



    Public Const WM_HOTKEY As Integer = &H312

    Dim isMuted As Boolean = True

    Dim WithEvents oSkype As SKYPE4COMLib.Skype = New SKYPE4COMLib.Skype



    <DllImport("User32.dll")> _

    Public Shared Function RegisterHotKey(ByVal hwnd As IntPtr, ByVal id As Integer, ByVal fsModifiers As Integer, ByVal vk As Integer) As Integer

    End Function



    <DllImport("User32.dll")> _

    Public Shared Function UnregisterHotKey(ByVal hwnd As IntPtr, ByVal id As Integer) As Integer

    End Function



    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        RegisterHotKey(Me.Handle, 100, 0, Keys.VolumeMute)

        Try

            oSkype.Attach(8, True)

        Catch ex As Exception

            MsgBox("Can't attach to skype (not online).")

        End Try

    End Sub



    Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)

        If m.Msg = WM_HOTKEY Then

            Dim id As IntPtr = m.WParam

            Select Case (id.ToString)

                Case "100"

                    oSkype.Mute = isMuted

                    'MsgBox(isMuted)

            End Select

        End If

        MyBase.WndProc(m)

    End Sub



    Private Sub oSkype_Mute(ByVal Status As Boolean) Handles oSkype.Mute

        isMuted = Status

    End Sub



    Private Sub Form1_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing

        UnregisterHotKey(Me.Handle, 100)

        UnregisterHotKey(Me.Handle, 200)

    End Sub

End Class

I'm facing 2 problems now.

Because I'm using the mute button, it does not mute the sound anymore. Is there a way to fix it so both hotkeys will respond (Will mute skype AND mute sound).
For some reason, when I first press the mute button to test it, it does mute the microphone but the second time it doesn't unmute. The "isMuted" value stays true even though it should change (Look at the code).

Thanks for the help.