Combo box issue

[dOtnEt_noob]

Ok i have a combo box... that gets populated apon running....
I want to be able to have something selected and click a button and have an action taken when the button is clicked...
Here is my Code:

Dim pathC, PathA, PathD, PathE As Object
    Dim mp3, wav As Object
 
Private Sub form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        mp3 = ".Mp3"
        wav = ".Wav"
        pathC = "C:\"
        PathA = "A:\"
        PathD = "D:\"
        PathE = "E:\"
        cmbDrives.Items.Add(pathC)
        cmbDrives.Items.Add(PathA)
        cmbDrives.Items.Add(PathD)
        cmbDrives.Items.Add(PathE)
        cmbType.Items.Add(mp3)
        cmbType.Items.Add(wav)
    End Sub

When i Click the button Search i want it to look at the selected field in the combobox (CmbDrives) and just tell me what is selected...(through a msgbox)
there is more but that is my only question untill i get stuck again