vb.net - 如何使用 APPCOMMAND_MICROPHONE_VOLUME_MUTE

Question

Public Class frm_main
    Private Const APPCOMMAND_MICROPHONE_VOLUME_MUTE As Integer = &H180000
    Private Const WM_APPCOMMAND As Integer = &H319

    Declare Function SendMessageW Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal Msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr

    Private Sub btn_mute_Click(sender As Object, e As EventArgs) Handles btn_mute.Click
        SendMessageW(Me.Handle, WM_APPCOMMAND, Me.Handle, CType(APPCOMMAND_MICROPHONE_VOLUME_MUTE, IntPtr))
    End Sub
End Class

它不起作用，但我可以使扬声器静音。

标签： vb.net