simple question:the slot and signal of QTreeWidget

[weixj2003ld]

Thanks a lot.
But if I add the Q_OBJECT to my program,and compile it,the errors occur:

cprojecttree.obj : error LNK2001: unresolved external symbol  "public: virtual struct QMetaObject const * __thiscall CTreeClass::metaObject(void)const " (?metaObject@CTreeClass@@UBEPBUQMetaObject@@XZ)
cprojecttree.obj : error LNK2001: unresolved external symbol  "public: virtual void * __thiscall CTreeClass::qt_metacast(char const *)" (?qt_metacast@CTreeClass@@UAEPAXPBD@Z)
cprojecttree.obj : error LNK2001: unresolved external symbol  "public: virtual int __thiscall CTreeClass::qt_metacall(enum QMetaObject::Call,int,void * *)" (?qt_metacall@CTreeClass@@UAEHW4Call@QMetaObject@@HPAPAX@Z)

cprojecttree.obj : error LNK2001: unresolved external symbol  "public: virtual struct QMetaObject const * __thiscall CTreeClass::metaObject(void)const " (?metaObject@CTreeClass@@UBEPBUQMetaObject@@XZ)
cprojecttree.obj : error LNK2001: unresolved external symbol  "public: virtual void * __thiscall CTreeClass::qt_metacast(char const *)" (?qt_metacast@CTreeClass@@UAEPAXPBD@Z)
cprojecttree.obj : error LNK2001: unresolved external symbol  "public: virtual int __thiscall CTreeClass::qt_metacall(enum QMetaObject::Call,int,void * *)" (?qt_metacall@CTreeClass@@UAEHW4Call@QMetaObject@@HPAPAX@Z)

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[aamer4yu]

Try rebuilding the project ...
from step to making project file...(qmake -tp vc :::in windows)