newb question on processes [Don't activate]

sry if I didnt search correctly for this, but I could find nothing on either google or here.

How do I send a command in applescript to a process in the background. Such as if I have textedit for example behind a safari window which is selected.
I want to send a tell to textedit but not have to activate it first. This is my first applescript project so any and all help is greatly appreciated.

How about this?

tell application "TextEdit"
	-- whatever
end tell

AppleScript Language Guide: Launch

Oops - never mind. Made a silly mistake so I removed it.