wpf中，隐藏或去除window右上角的关闭按钮

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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);

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