Spellcheck on outside application - newbie

[Peter Hansen]

Evan McPeters wrote:

> I need to develop a program that will spell check a word processing window
> that is open in another application. I do not have access to the the API or
> any other code for this application, so I was hoping that the spell checker
> could simply do it's job on whatever the user's active window is.
> 
> Does this make sense. Does anyone have an idea about how to start this.

What is this 'other application' ?