Setting the text in an edit box of another application

[C++ Programming]

I am trying to interact programmatically with another application, and have succeeded in finding the handle of the correct edit box in the application's dialog. However, I can't seem to find a way to send text to the dialog control. The MSDN documetation for ::SetWindowText() states that it cannot be used to modify the text in another application. What other means is there to achieve the text transfer ?

Doug