class MaClasse 
{ 
public : 

    static DWORD WINAPI StaticThreadFunc( void *Param ) 
    { 
        MaClasse* Obj = reinterpret_cast<MaClasse*>( Param ); 
        return Obj->ThreadFunc(); 
    } 

private : 

    DWORD ThreadFunc() 
    { 
        // ... 
        return 0; 
    } 
};