定义树控件的id该怎么定义????
继承树控件类，在树视图类里创建怎么不行？
#define ID_MYTREE 4000
m_TreeCtrl.Create(WS_VISIBLE | WS_TABSTOP | WS_CHILD | WS_BORDER | TVS_HASBUTTONS | TVS_LINESATROOT | TVS_HASLINES | TVS_DISABLEDRAGDROP | TVS_NOTOOLTIPS | TVS_EDITLABELS,CRect(10, 10, 300, 100), this, ID_MYTREE);
