Adding wxDC::GetHandle for wxOSX-cocoa and wxOSX-carbon

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72224 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dc.h

@@ -283,6 +283,8 @@ public:
         return NULL;
     }
 
+    virtual void* GetHandle() const = 0;
+    
     // query dimension, colour deps, resolution
 
     virtual void DoGetSize(int *width, int *height) const = 0;
@@ -787,6 +789,9 @@ public:
     wxWindow *GetWindow() const
         { return m_pimpl->GetWindow(); }
 
+    void *GetHandle() const
+        { return m_pimpl->GetHandle(); }
+
     bool IsOk() const
         { return m_pimpl && m_pimpl->IsOk(); }