of course,the following is code.but i still cannot decalre the static variable in class scope,when i do it ,the VC7 always report various error.either not define the variable or cannot be interped by metaobject.
Qt Code: 
  1. ///////////////////////storescpThread.h
  2. typedef (*STORESCPCALLBACK)(void *callbackData, char* statusDetail);
  3. static unsigned long classAddress;
  4. class storescpThread:public QThread
  5. {
  6. Q_OBJECT
  7. public:
  8.     storescpThread(QTextEdit *txtEdit,QObject *parent = 0)
  9.     ~storescpThread();
  10. protected:
  11.      void run();
  12.      static void emitMsg( unsigned long user_value,char  * filename)
  13.      {
  14.         storescpThread* pthis = (storescpThread*)user_value; // 
  15.         pthis->setText(state,filename);		
  16.      }
  17.    void mycallback();
  18. private :
  19.     QTextEdit * textEdit;	 
  20.     static void storeSCPCallback(void *callbackData, char* statusDetail);	
  21.     void setText(char * state,char * name);
  22. };
  23.  
  24. ///////////////////////storeScpThread.cpp
  25. storescpThread::storescpThread(QTextEdit *txtEdit,QObject *parent): QThread(parent)
  26. {
  27.     textEdit=txtEdit;
  28.    classAddress =(unsigned long)this ;
  29. }
  30. void storescpThread:: storeSCPCallback(void *callbackData, char* statusDetail)
  31. {
  32.     emitMsg(classAddress,statusDetail);
  33.     return ;
  34. }
  35. void  storescpThread::mycallback()
  36. {
  37.    myThirdCallFunction(storeSCPCallback);   //the third party function, which used callback as param
  38.  
  39. }
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