禁用AxWebBrowser右键菜单

出处：http://stackoverflow.com/questions/41781647/disabling-the-axwebbrowser-context-menu-vb-net

通过底层消息禁止鼠标右键消息传送到AxWebBrowser控件上，从而禁止了右键菜单。

以此类推，应该任何控件都可以用此方法禁止指定消息的传递。。

Public Class Form1
    Implements IMessageFilter

    Public Function PreFilterMessage(ByRef m As Message) As Boolean Implements IMessageFilter.PreFilterMessage
        Const WM_RBUTTONDOWN  As Integer = &H204
        Const WM_RBUTTONDBLCLK As Integer = &H206
        ' check that the message is WM_RBUTTONDOWN Or WM_RBUTTONDBLCLK
        ' verify AxWebBrowser1 is not null
        ' verify the target is AxWebBrowser1
        Return (m.Msg = WM_RBUTTONDOWN OrElse m.Msg = WM_RBUTTONDBLCLK) AndAlso (AxWebBrowser1 IsNot Nothing) AndAlso (AxWebBrowser1 Is Control.FromChildHandle(m.HWnd))
    End Function

    Protected Overrides Sub OnActivated(e As EventArgs)
        MyBase.OnActivated(e)
        ' Filter is application wide, activate filter with form
        Application.AddMessageFilter(Me)
    End Sub

    Protected Overrides Sub OnDeactivate(e As EventArgs)
        MyBase.OnDeactivate(e)
        ' Filter is application wide, remove when form not active
        Application.RemoveMessageFilter(Me)
    End Sub

End Class