copy using the frontmost window

[sims]

[Apologies if this email appears twice...first attempt did not seem 
to go through]

My goal is to get the hilited text from a field onto the clipboard in Windows.

With Applescript, the following does a 'command key C' or copy which gets the
hilited text of the frontmost window in OS X:

	tell application "System Events"
		key code 8 using command down
	end tell

It copies the hilited text from the frontmost window.

Is there a way to do this with Windows? I don't want to load any 
third party apps
to do this.  If Windows has a built-in means, comparable to the 
Applescript above
it would be great...but it must also be available in Vista.

I did find a promising 3rd party app called TXMouse, which copied any 
hilited text
to the clipboard. This proved to present quite a few 'challenges'  & surprises.

I'd like to have something built into my app if possible...I'd use a 
.dll if available.
Would anyone be interested in making a .dll to do this...if that is 
what is required?

Suggestions?

sims