Problem using member function when dealing with threading

[hanhao]

:) hi, i am new in programming and now dealing with some multi threading stuff

anyway i got problem when trying to use member function when doing threads

i searched around the net and found that 1 method is by using messages which is rather complex

another method that somebody posted is by casting:

DWORD pg_control::thr ( LPVOID lpvParam ) // static
{
    pg_control *thr = (pg_control*)lpvParam;
    
    thr->get_hosts(0,NULL);
    // Go on with code ...
    return 0;
}


void pg_control::OnNn()
{   
   AfxBeginThread (   (AFX_THREADPROC)pg_control::thr,  (LPVOID)this );}

however i get some errors

C:\Program Files\Microsoft Visual Studio\MyProjects\abc.cpp(222) : error C2440: 'type cast' : cannot convert from '' to 'unsigned int (__cdecl *)(void *)'
None of the functions with this name in scope match the target type
Error executing cl.exe.

AClient.exe - 1 error(s), 0 warning(s)

the problem lies in the red text
can anyone please correct and enlighten me?
thanks!

- using winxp programming for win98se
- MFC style
- VC++6.0 SP6 :)

[Danny]

First of all, you need to add the & operator before pg_control::thr:

(AFX_THREADPROC)&pg_control::thr
Secondly, you're using thr both as a function's name and as a local variable. This might confuse the compiler (especially if it's an older one, such as VC++). Finally, make sure that pg_control::thr is a static function. The comment says that it is, but it's worth checking pg_control.h again.