uint total = waveInGetNumDevs();

[DllImport ("coredll.dll", EntryPoint="waveInGetNumDevs", SetLastError=true)]

public static extern int waveInGetNumDevs();

public static extern uint waveInGetNumDevs();

Shared Function waveInGetNumDevs() As UInteger

        uint waveInDevicesCount = waveInGetNumDevs();

    public static extern uint waveInGetNumDevs();