Sorry for my poor english.
1.This article will give you a good reference for adding VC++ 6.0 to C::B compiler.
http://wiki.codeblocks.org/index.php?title=Integrating_Microsoft_Visual_C_6_with_Code::Blocks_IDE2. In project->build options ,
you should select "Multi-threaded DLL debug runtime library[/MDd]", or you will get an link error.
3. In project->build options ->linker setting, "/subsystem:console /incremental:yes" should be added. If this step is missed, linker will print “error LNK1561: entry point must be defined” message.
Good luck.