WPF 通过Win32SDK修改窗口样式

       
        [DllImport("user32.dll", EntryPoint = "GetWindowLong")]
        public static extern int GetWindowLong(IntPtr hwnd, int nIndex);

        [DllImport("user32.dll", EntryPoint = "SetWindowLong")]
        public static extern int SetWindowLong(IntPtr hMenu, int nIndex, int dwNewLong);

private void DisableSizebox()
        {
            int GWL_STYLE = -16;
            int WS_THICKFRAME = 0x00040000;
            IntPtr handle = new WindowInteropHelper(this).Handle;
            int  nStyle = GetWindowLong(handle, GWL_STYLE);
            //禁用调整窗口大小
            nStyle &= ~WS_THICKFRAME;
            SetWindowLong(handle, GWL_STYLE,nStyle);
        }

nStyle|=WS_THICKFRAME

//禁用
nStyle &= ~WS_CAPTION&~WS_MINIMIZEBOX;
//启用
nStyle |= WS_MAXIMIZEBOX| WS_CAPTION;