Sysinternals Freeware - Information for Windows NT and Window...

Ever wondered which program has a particular file or directory open? Now you can find out. HandleEx shows you information about which handles and DLLs processes have opened or loaded. Its display consists of two sub-windows. The top always shows a list of the currently active processes, including the names of their owning accounts, whereas the information displayed in the bottom window depends on the mode that HandleEx is in: if it is in handle mode on Windows NT/2K you’ll see the handles that the process selected in the top window has opened - if you're on Windows 9x/Me you'll see the list of files and directories the process has opened; if HandleEx is in DLL mode you’ll see the DLLs and memory-mapped files that the process has loaded. HandleEx also has a powerful search capability that will quickly show you which processes have particular handles opened or DLLs loaded.

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