this is my first time making a hack and there is only one problem left for me

1>c:\users\xxx\documents\visual studio 2008\projects\xxx\xxx\hack.cpp(175) : error C2065: 'HackThread' : undeclared identifier


this is the only error left..

anybody here who could please help me...
i'm using visual C++ express edition and my os is win7 32 bit...