How to disable 'Beep' sound when maxLength is reached in Textbox?

Sorry for my poor English.

I wanna disable ‘Beep’ sound in textbox.

I tried like below.

private void TextBox_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (((TextBox)sender).Text.Length == ((TextBox)sender).MaxLength)
        {
            e.Handled = true;
        }
    }
this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.TextBox_KeyPress);

It works, but editing text is also disabled after maxlength is reached.

I still wanna edit text in textbox even if the maximum length is reached.

I don’t need ‘Beep’ sound in my application, so it is okay to disable ‘Beep’ sound in whole application.

How can I disable it?