chore: add comments

src/ScreenGrab/Extensions/WpfExtensions.cs

@@ -6,28 +6,38 @@ namespace ScreenGrab.Extensions;
 
 public static class WpfExtensions
 {
+    /// <summary>
+    ///     Gets the absolute position of the specified window.
+    /// </summary>
+    /// <param name="w">The window for which to get the absolute position.</param>
+    /// <returns>A <see cref="Point" /> representing the absolute position of the window.</returns>
     public static Point GetAbsolutePosition(this Window w)
     {
+        // If the window is not maximized, return the top-left corner position of the window
         if (w.WindowState != WindowState.Maximized)
             return new Point(w.Left, w.Top);
 
         Int32Rect r;
+        // Check if the system supports multiple monitors
         var multimonSupported = OSInterop.GetSystemMetrics(OSInterop.SM_CMONITORS) != 0;
         if (!multimonSupported)
         {
+            // If multiple monitors are not supported, get the work area rectangle of the primary monitor
             var rc = new OSInterop.RECT();
             OSInterop.SystemParametersInfo(48, 0, ref rc, 0);
             r = new Int32Rect(rc.left, rc.top, rc.width, rc.height);
         }
         else
         {
+            // If multiple monitors are supported, get the monitor information for the monitor containing the window
             var helper = new WindowInteropHelper(w);
             var hmonitor = OSInterop.MonitorFromWindow(new HandleRef(null, helper.EnsureHandle()), 2);
             var info = new OSInterop.MONITORINFOEX();
             OSInterop.GetMonitorInfo(new HandleRef(null, hmonitor), info);
             r = new Int32Rect(info.rcMonitor.left, info.rcMonitor.top, info.rcMonitor.width, info.rcMonitor.height);
         }
 
+        // Return the top-left corner position of the monitor
         return new Point(r.X, r.Y);
     }
 }