How do I use SendKeys if I know the hWnd

[Daniel_Christie]

Let's say I have program that a user can enter some text into a textbox (txtDetails). And there is a seperate 3rd party program that has a form with a single text box on it.
If I already know the 3rd party program's textbox hWnd (238), how do I properly paste txtDetails.Text in it's text box?

Any help will be greatly appreciated and certainly rewarded with my undying graditude,
Daniel Christie