C# Signature:

[DllImport("user32.dll")]
static extern bool RemoveMenu(IntPtr hMenu, uint uPosition, uint uFlags);

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

public class RemoveXButton
{
    [System.Runtime.InteropServices.DllImport("user32.dll")]
    static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
    [System.Runtime.InteropServices.DllImport("user32.dll")]
    static extern int GetMenuItemCount(IntPtr hMenu);
    [System.Runtime.InteropServices.DllImport("user32.dll")]
    static extern bool DrawMenuBar(IntPtr hWnd);
    [System.Runtime.InteropServices.DllImport("user32.dll")]
    static extern bool RemoveMenu(IntPtr hMenu, uint uPosition, uint uFlags);
    private const Int32 MF_BYPOSITION = 0x400;
    private const Int32 MF_REMOVE = 0x1000;

    public static void RemoveCloseButton(Form frm)
    {
        IntPtr hMenu;
        int n;
        hMenu = GetSystemMenu(frm.Handle,false);
        if(hMenu != IntPtr.Zero)
        {
            n = GetMenuItemCount(hMenu);
            if(n > 0)
            {
              //Removes the actual Close button
              RemoveMenu(hMenu, (uint)(n-1), MF_BYPOSITION|MF_REMOVE);
              //Removes the seperator between the Close button and the Maximize button
              RemoveMenu(hMenu, (uint)(n-2), MF_BYPOSITION | MF_REMOVE);
              DrawMenuBar(frm.Handle);
            }
        }
    }

}

Alternative Managed API:

Do you know one? Please contribute it!

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).