Add new clipboard api and support for it in the ie backend. Also extend the sample to demonstrate the new functions.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/SOC2011_WEBVIEW@68129 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/webview_ie.h

@@ -77,6 +77,14 @@ public:
     virtual wxWebViewZoom GetZoom();
     virtual void SetZoom(wxWebViewZoom zoom);
 
+    //Clipboard functions
+    virtual bool CanCut();
+    virtual bool CanCopy();
+    virtual bool CanPaste();
+    virtual void Cut();
+    virtual void Copy();
+    virtual void Paste();
+
     // ---- IE-specific methods
 
     // FIXME: I seem to be able to access remote webpages even in offline mode...
@@ -124,6 +132,10 @@ private:
     bool m_historyLoadingFromList;
     bool m_historyEnabled;
 
+    //Generic helper functions for IHtmlDocument commands
+    bool CanExecCommand(wxString command);
+    void ExecCommand(wxString command);
+
 };
 
 #endif // wxUSE_WEBVIEW_IE