VC 6.0创建 CtrlTree 树控菜单(树形菜单)的实例源代码,下面简要说下具体的实现过程:在树控件中添加连线和按钮:   m_ctrlTree.ModifyStyle(0, TVS_HASLINES | TVS_LINESATROOT | TVS_HASBUTTONS);   CString strText = _T("");   //在树控件中插入项   HTREEITEM hRoot = m_ctrlTree.InsertItem(_T("Root"));   for (int i = 0; i < 4; i )   {    strText.Format(_T("Item