public class Screen

    {

        /// Primary Screen

        #region Win32 API

        [DllImport("user32.dll")]

        static extern IntPtr GetDC(IntPtr ptr);

        [DllImport("gdi32.dll")]

        static extern int GetDeviceCaps(

        IntPtr hdc, // handle to DC

        int nIndex // index of capability

        );

        [DllImport("user32.dll", EntryPoint = "ReleaseDC")]

        static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDc);

        #endregion

        #region DeviceCaps常量

        const int HORZRES = ;

        const int VERTRES = ;

        const int LOGPIXELSX = ;

        const int LOGPIXELSY = ;

        const int DESKTOPVERTRES = ;

        const int DESKTOPHORZRES = ;

        #endregion

        #region 属性

        /// <summary>

        /// 获取屏幕分辨率当前物理大小

        /// </summary>

        public static Size WorkingArea

        {

            get

            {

                IntPtr hdc = GetDC(IntPtr.Zero);

                Size size = new Size();

                size.Width = GetDeviceCaps(hdc, HORZRES);

                size.Height = GetDeviceCaps(hdc, VERTRES);

                ReleaseDC(IntPtr.Zero, hdc);

                return size;

            }

        }

        /// <summary>

        /// 当前系统DPI_X 大小 一般为96

        /// </summary>

        public static int DpiX

        {

            get

            {

                IntPtr hdc = GetDC(IntPtr.Zero);

                int DpiX = GetDeviceCaps(hdc, LOGPIXELSX);

                ReleaseDC(IntPtr.Zero, hdc);

                return DpiX;

            }

        }

        /// <summary>

        /// 当前系统DPI_Y 大小 一般为96

        /// </summary>

        public static int DpiY

        {

            get

            {

                IntPtr hdc = GetDC(IntPtr.Zero);

                int DpiX = GetDeviceCaps(hdc, LOGPIXELSY);

                ReleaseDC(IntPtr.Zero, hdc);

                return DpiX;

            }

        }

        /// <summary>

        /// 获取真实设置的桌面分辨率大小

        /// </summary>

        public static Size DESKTOP

        {

            get

            {

                IntPtr hdc = GetDC(IntPtr.Zero);

                Size size = new Size();

                size.Width = GetDeviceCaps(hdc, DESKTOPHORZRES);

                size.Height = GetDeviceCaps(hdc, DESKTOPVERTRES);

                ReleaseDC(IntPtr.Zero, hdc);

                return size;

            }

        }

        /// <summary>

        /// 获取宽度缩放百分比

        /// </summary>

        public static float ScaleX

        {

            get

            {

                IntPtr hdc = GetDC(IntPtr.Zero);

                int t = GetDeviceCaps(hdc, DESKTOPHORZRES);

                int d = GetDeviceCaps(hdc, HORZRES);

                float ScaleX = (float)GetDeviceCaps(hdc, DESKTOPHORZRES) / (float)GetDeviceCaps(hdc, HORZRES);

                ReleaseDC(IntPtr.Zero, hdc);

                return ScaleX;

            }

        }

        /// <summary>

        /// 获取高度缩放百分比

        /// </summary>

        public static float ScaleY

        {

            get

            {

                IntPtr hdc = GetDC(IntPtr.Zero);

                float ScaleY = (float)(float)GetDeviceCaps(hdc, DESKTOPVERTRES) / (float)GetDeviceCaps(hdc, VERTRES);

                ReleaseDC(IntPtr.Zero, hdc);

                return ScaleY;

            }

        }

        #endregion

    }