ListDLLs is a command line tool . ListDLLs provides a list of DLLs that are in use and also their path. The list indicates which DLLs have a version different from their original version on the disk (such DLLs are flagged in the list). The path column in the list shows which DLLs are relocated.
ListDLLs can be downloaded from:http://www.microsoft.com/technet/sysinternals/ProcessesAndThreads/ListDlls.mspx
Process Explorer is the GUI version of the ListDLLs program.
Process Explorer can be downloaded from: http://www.microsoft.com/technet/sysinternals/utilities/processexplorer.mspx