How could I display a dialog attached to a window?

Question

If there is a way to do this, how could I, in Xcode 5, cocoa applescript? Something like:
Display dialog "Hello Red_Menace" attached to MyWindow
I know sheets can do this, but this seems a lot more simple, because I wouldn't have to design a window and link it.

Answer 1

I saw what you did there...
You don't necessarily need to create another window for simple alerts, you can use the NSAlert class.  I think there is still some weirdness with sheets, so the easiest way to do a sheet would be to use Myriad Helpers, which has a category that adds some methods to the NSAlert class, for example:
tell Cocoa's NSAlert's makeAlert_buttons_text_("Alert", {"OK"}, "Hiya,  Apple_For_The_Win" & return & "This sheet will give up after 10 seconds")
  showOver_calling_wait_(mainWindow, {"sheetDismissed:", me}, 10)
end tell
on sheetDismissed_(theButton) -- the sheet has been dismissed
  # whatever
end sheetDismissed_
The completion handler (sheetDismissed in this case) is called when the sheet is dismissed, and is passed the name of the button (or 'Gave Up').