1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
| Imports System
Imports System.Windows.Forms
Imports System.Runtime.InteropServices
Public Class Form1
Inherits Form
Private Const APPCOMMAND_VOLUME_MUTE As Integer = &H80000
<DllImport("user32.dll")> _
Public Shared Function SendMessageW(ByVal hWnd As IntPtr, _
ByVal Msg As Integer, ByVal wParam As IntPtr, _
ByVal lParam As IntPtr) As IntPtr
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
SendMessageW(Me.Handle, WM_APPCOMMAND, _
Me.Handle, New IntPtr(APPCOMMAND_VOLUME_MUTE))
End Sub |
