如何禁用对文本框密码字段系统的大写锁定的通知 [英] how to disable System's caps-lock notification on textbox password field

问题描述

在的WinForms 文本框，我已经定义了新的工具提示并进行配置。我已经设置了 PasswordChar 来'*'。然而，当大写锁定，两个提示所示。其中之一是我，另一个是系统的默认提示的通知。我只是想表明我的提示。我想禁用系统的提示。如何禁用呢？

In Winforms Textbox, I have defined new ToolTip and configured it. I have set the PasswordChar to '*'. However, when caps lock is on, two tooltip is 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?

推荐答案

的一种方法是从现有的派生自己的TextBox控件和处理EM_SHOWBALLOONTIP消息。 。然后，只需拖动该控件到窗体，而不是常规的文本框控件

One way is to derive your own textbox control from the existing one and handle the EM_SHOWBALLOONTIP message. Then just drag this control onto your form instead of the regular textbox control.

public partial class PasswordTextBox : TextBox
{
    private const int EM_SHOWBALLOONTIP = 0x1503;

    protected override void WndProc(ref Message m)
    {
        if (m.Msg == EM_SHOWBALLOONTIP)
        {
            m.Result = (IntPtr)0;
            return;
        }
        base.WndProc(ref m);
    }

    public PasswordTextBox()
    {
        InitializeComponent();
    }
}

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