1. Click the Windows 'Start' button and type 'cmd' into the Start Search text box. Press 'Enter' and the command line window opens.
2. Type 'regsvr32 /?' and press 'Enter' to view a list of options for the utility. To register and install a DLL file, you need only the 's' switch.
3. Type 'regsvr32 /s dllfile.dll' and press 'Enter.' Replace 'dllfile.dll' with your own DLL file name. For instance, if you want to register a DLL file named 'mydll.dll,' the following text installs the file:regsvr32 /s mydll.dll