如何禁用鼠标单击突出显示？

Question

I have a scientific calculator application in C#. I'd like to disable click highlight, you know, I click the button with mouse, and the button will be highlighted. It's very annoying, because I can't use the enter key event, when the button is highlighted, and in this case not working the execute function with enter. The calculator use the highlighted button instead of the execute function.

I hope my problem is understandable. What can I do?

Answer 1

In your form, try setting KeyPreview = true and override OnKeyDown :

public ExampleForm()
{
    InitializeComponent();

    KeyPreview = true;
}

protected override void OnKeyDown(KeyEventArgs e)
{
    base.OnKeyDown(e);

    if (e.KeyData == Keys.Enter)
    {
        e.Handled = true;

        // Execute calculator function
    }
}