wpf中，隐藏window右上角的关闭按钮

window右上角的关闭按钮，wpf没有提供可操作的方法，所以借助user32.dll的api。

第一种方法：

只能disable 关闭按钮。

[DllImport("USER32.DLL", CharSet = CharSet.Unicode)]

        private static extern IntPtr GetSystemMenu(IntPtr hWnd, UInt32 bRevert);

        [DllImport("USER32.DLL ", CharSet = CharSet.Unicode)]

        private static extern UInt32 RemoveMenu(IntPtr hMenu, UInt32 nPosition, UInt32 wFlags);

        private const UInt32 SC_CLOSE = 0x0000F060;

        private const UInt32 MF_BYCOMMAND = 0x00000000;

在window的loaded事件中添加：

var hwnd = new WindowInteropHelper(this).Handle;  //获取window的句柄

IntPtr hMenu = GetSystemMenu(hwnd, 0);

RemoveMenu(hMenu, SC_CLOSE, MF_BYCOMMAND);

第二种方法：

彻底去除关闭按钮。

  http://www.cnblogs.com/khler/archive/2009/11/26/1611446.html

  private const int GWL_STYLE = -16;

        private const int WS_SYSMENU = 0x80000;

        [DllImport("user32.dll", SetLastError = true)]

        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);

        [DllImport("user32.dll")]

        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

在window的loaded事件中添加：

var hwnd = new WindowInteropHelper(this).Handle; 

SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) & ~WS_SYSMENU);