added wxDisplay::GetClientArea() (currently implemented for single display and MSW implementations only)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38147 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/display.h

@@ -68,9 +68,12 @@ public:
     // return true if the object was initialized successfully
     bool IsOk() const { return m_impl != NULL; }
 
-    // get the display size
+    // get the full display size
     wxRect GetGeometry() const;
 
+    // get the client area of the display, i.e. without taskbars and such
+    wxRect GetClientArea() const;
+
     // name may be empty
     wxString GetName() const;