>Is there any relation from wc.dll to DLLHost.exe? We are trying to figure if when running the wc.dll that this could affect the CPU process of the requests of other applications which could make use of DLLHost.exe.

There shouldn't be any relation unless your isolation level is not low or you're running COM+ components. There's some info on DLLHost here:

http://support.microsoft.com/kb/290884/EN-US/