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rundll32 usage example
Really Old Note
rundll32.exe
can be used to start DLL file without executable file. It is very
nice if you know what you are doing:
rundll32.exe %SystemRoot%\system32\shimgvw.dll,ImageView_Fullscreen %1
rundll32.exe url.dll,FileProtocolHandler "C:\Documents and Settings\Sergei\My Documents\My Pictures\JumpKeys-1.PNG"
The following is possibly an
original source of information.