Clarified wxPropertyGrid::HitTest() docs

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58884 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/propgrid/propgrid.h

@@ -672,6 +672,11 @@ public:
 
     /**
         Returns information about arbitrary position in the grid.
+
+        @param pt
+            Logical coordinates in the virtual grid space. Use
+            wxScrolledWindow::CalcUnscrolledPosition() if you need to
+            translate a scrolled position into a logical one.
     */
     wxPropertyGridHitTestResult HitTest( const wxPoint& pt ) const;