错了
m_TreeCtrl.Create(WS_VISIBLE | WS_TABSTOP | WS_CHILD | WS_BORDER
| TVS_HASBUTTONS | TVS_LINESATROOT | TVS_HASLINES
| TVS_DISABLEDRAGDROP|TVS_EDITLABELS|TVS_TRACKSELECT,
CRect(10, 10, 300, 100), this, ID_TREECTRL);
ID_TREECTRL在.h里面定义了#define ID_TREECTRL 2001
出错就是在上面的代码
#define ID_TREECTRL 2001是什么作用的呢?