Problem with getting command line parameters

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Hi,

I have this problem which might be very simple.

I want to do something like this:

makensis myscript.nsi param1 param2

ie while compiling my nsis script I want it to get some parameters. I am facing two problmes while running:

1. 'makensis' is not recognized as an internal or external command, operable program or batch file.

2. I am not getting param1 and param2 at compile time.

I am searching for a long time on this forum, but could not find the answers.

Prabhat.