Way to use Nil in a call?

Scripting Forums AppleScriptObjC and Xcode
#1

There are enough uses for Nil, but how do I roll that into my ASOC code? Can I declare a nil something sorta like this?

property theNil: constant NSNil

Then I could use it in a call like

tell mainWindow to makeFirstResponder_(theNil)

or wherever else a nil is required, but null just doesn’t work.

I didn’t (or couldn’t) search for Nil used in any other of the ASOC posts here (maybe nil is too short to search)

#2

Where nil is required, use missing value.