To Run a .dll file..First find out what are functions it is exporting..Dll files will excecute
the functions specified in the Export Category..To know what function it is Exporting refer "filealyzer"
Application..It will show you the export function under "PE EXPORT" Category..Notedown the
function name--
Then open the command prompt,Type Rundll32 dllname,functionname
(dllname--name of your dll)
(Functionname-- name of the function you found under the PE Export)
Note:Makesure that your command prompt location is your dll file location