Welcome to the monastery!

This will give you a start (from memory and untested)

> 1. How do I make my script to accept these three (3) name/value pairs via STDIN?

 
while (my $line = <STDIN> ) {
   chomp $line;
   ...
}
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> 2. How do I access these values from within my script?

 %args = split /\s*=\s*/, $line;

> 3. How do I test such a call on Windows?

 C:>echo a = 1 |perl -e " print split /=/, <STDIN>"
a  1
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or

 C:>echo a = 1 |perl myScript.pl

or (update)

you can put the lines after __DATA__ at the of your code and replace <STDIN> with <DATA> while testing.

while (my $line = <DATA> ) {

...

__DATA__
a=1 b=2 
c=3
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You've been a unclear about the exact format of your arguments ^* , depending on this it might be a bit more complicated.

But we expect you to try and are happy to help if you give decent feedback ...

HTH! :)

*) like

• All in one line?
• Whitespace separated?
• Vaules quoted?
• Do you control the format?
• ...