The most common way to install a DLL on windows is to use the MSDOS command prompt using the program regsvr32.exe. * Install DLL. From the CMD line type,

regsvr32.exe e.g. regsvr32.exe tools.dll

* Uninstall DLL.

regsvr32.exe -u regsvr32.exe -u tools.dll

Regsvr32.exe can be found in the system directory of Windows. c:\windows\system or c:\windows\system32 or c:\winnt\system32 Depending on the Windows OS you are running. To get help about the parameters, type, regsvr32.exe NO DLL name specified.

usage:
 regsvr32 [/u] [/s] [/n] [/i[:cmdline]] dllname where
/u means 'Unregister server'
/s means 'Silent (=display no message boxes)'
/i means 'Call Dllinstall passing an optional [cmdline]; when used with
/u calls dll uninstall'
/n means 'do not call DllRegisterServer; this option must be used with /i'