How to disable system's caps-lock notification on Textbox [duplicate]

问题

This question already has an answer here:

how to disable System's caps-lock notification on textbox password field (1 answer)

Closed 5 years ago.

In Winforms Textbox, I have defined new ToolTip and configured it. However, when caps lock is on, two tooltips are shown. One of them is mine the other one is system's default tooltip notification. I only want to show my tooltip. I want to disable system's tooltip. How can I disable it ?

回答1:

I found an answer here, and have translated the code to VB.NET:

Public Class CustomMaskedTextBox
    Inherits MaskedTextBox

    Private m_DisableBalloonTips As Boolean
    Public Property DisableBalloonTips() As Boolean
        Get
            Return m_DisableBalloonTips
        End Get
        Set
            m_DisableBalloonTips = Value
        End Set
    End Property


    Protected Overrides Sub WndProc(ByRef m As Message)
        Private Const EM_SHOWBALLOONTIP As Integer = &H1503
        If m.Msg = EM_SHOWBALLOONTIP AndAlso DisableBalloonTips Then
            m.Result = IntPtr.Zero
            Return
        End If
        MyBase.WndProc(m)
    End Sub
End Class

来源：https://stackoverflow.com/questions/25460336/how-to-disable-systems-caps-lock-notification-on-textbox