How can I allow ctrl+a with TextBox in winform?

Question

I'm asking the question already asked (and even answered) here: Why are some textboxes not accepting Control + A shortcut to select all by default

But that answer doesn't work for me. I have this code:

public class LoginForm : Form
{
    private TextBox tbUsername;

    public LoginForm()
    {
        tbUsername = new TextBox();
        tbUsername.ShortcutsEnabled = true;
        tbUsername.Multiline = false;
        Controls.Add(tbUsername);
    }
}

The textbox shows up, I can write on it, I can cut, copy and paste text on it without any problems. But when I try to press Ctrl+A I only hear a "bling" similar to the bling that you hear if you try to erase text from an empty textbox (try it with your browser's address bar).

Answer 1

Like other answers indicate, Application.EnableVisualStyles() should be called. Also the TextBox.ShortcutsEnabled should be set to true. But if your TextBox.Multiline is enabled then Ctrl+A will not work (see MSDN documentation). Using RichTextBox instead will get around the problem.