How to add checkboxes to the tree control in wxwidgets

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C++

wxWidgets

Actually I have created one tree control with wxTreeCtrl class,but I cant get the checkboxes to that ctrl. I have tried in but no use, so will u plz tell me how to add checkboxes to that treectrl in wxWidgets.

What I have tried:

wxTreeItemId rootId = tree->AddRoot("Root");

	wxTreeItemId child2Id = tree->AppendItem(rootId, "Child1");

	//tree->AppendItem(new wxCheckBox(this, -1, wxT("")), 0, wxEXPAND);
	tree->AppendItem(child2Id, "mark1");
	tree->AppendItem(child2Id, "mark2");

	tree->ExpandAll();