Disabling F10 key from moving focus to menu bar in C# Winforms program

Use the KeyDown Event for your form, and handle the Keystroke:

private void form_KeyDown(object sender, KeyEventArgs e)
{ if(e.KeyData == Keys.F10)
    {
        // Do what you want with the F10 key
        e.SuppressKeyPress = true;
    }
}

Also make sure that your forms KeyPreview is set to true.