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Under Vista if we disable the System Close (X button top right corner) with

        private const int SC_CLOSE = 0xF060;
        private const int MF_BYCOMMAND = 0x0;
        private const int MF_ENABLED = 0x0;
        private const int MF_DISABLED = 0x2;

        [DllImport("user32.dll")]
        private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);

        [DllImport("user32.dll")]
        private static extern int EnableMenuItem(IntPtr hMenu, int wIDEnableItem, int wEnable);
..........
..........
            int state = m_enable ? MF_ENABLED : MF_DISABLED;
            IntPtr hMenu = GetSystemMenu(m_form.Handle, false);

            EnableMenuItem(hMenu, SC_CLOSE, MF_BYCOMMAND | state);

we get a disabled X button displayed on the ribbon so far so good.

However under Windows XP the Ribbon Bar X button the behaviour is inconsistent. On a form without the ribbon bar the X Button appears disabled, with the Ribbon Bar present the the button appears enabled?,

How can I make the button appear disabled?

Thanks

We reproduced the bug. Thank you. It is fixed already. The fix will be available in v.3.6, which is coming soon.

Any results on this yet?

Thanks

Thank you for reporting the problem. We will check it and let you know the results.

Guys,

Discovered another little issue with this. It would appear that minimizing the Application with the close button disabled and then re-selecting the application from the Start bar re-enables the close button

It doesn’t deal with Elegant Ui, it is the way Windows Forms works. You should update the Close button state after restoring.