C / C++ / MFC

class CMyClass
{
    virtual	DWORD	DoScan ();
    static	DWORD WINAPI DoScanStatic (LPVOID lpParameter);
    ... etc.
};

main ()
{
    ...
    DWORD dwID;
    HANDLE hThread;
    hThread = ::CreateThread (NULL, 0, DoScan, this, CREATE_SUSPENDED, &dwID);   // This will error
    hThread = ::CreateThread (NULL, 0, DoScanStatic, this, CREATE_SUSPENDED, &dwID);   // This will work
    ...
}

virtual DWORD   DoScan ();
static  DWORD WINAPI DoScan (LPVOID lpParameter)
{
    CMyClass *my = (CMyClass *) lpParameter;
    ASSERT(my);
    if (my == NULL)
        return 0;  // Or throw an exception, etc.
    return my->DoScan ();
}