WIP

Hyperbar.Windows.Interop/SystemInformationHelper.cs

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+using System.Runtime.InteropServices;
+using Windows.Foundation;
+using Windows.Win32;
+using Windows.Win32.Foundation;
+using Windows.Win32.UI.WindowsAndMessaging;
+
+namespace Hyperbar.Windows.Interop;
+
+internal static class SystemInformationHelper
+{
+    private const int SPI_GETWORKAREA = 48;
+
+    public static Rect VirtualScreen => GetVirtualScreen();
+
+    public static Rect WorkingArea => GetWorkingArea();
+
+    private static Rect GetVirtualScreen()
+    {
+        Size size = new(PInvoke.GetSystemMetrics(SYSTEM_METRICS_INDEX.SM_CXSCREEN), 
+            PInvoke.GetSystemMetrics(SYSTEM_METRICS_INDEX.SM_CYSCREEN));
+        return new Rect(0, 0, size.Width, size.Height);
+    }
+
+    private static Rect GetWorkingArea()
+    {
+        RECT rect = new();
+
+        SystemParametersInfo(SPI_GETWORKAREA, 0, ref rect, 0);
+        return new Rect(rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);
+    }
+
+    [DllImport("user32.dll", CharSet = CharSet.Auto)]
+    private static extern bool SystemParametersInfo(int nAction, int nParam, ref RECT rc, int nUpdate);
+}