The SendMessage plug-in is designed to facilitate control of various third-party applications from FARR. It uses the windows PostMessage api to send standard window messages to the window/dialog of an application you the user specifies by class or title or both.
The user also specifies the UINT, wParam and lParam, and thus it can be used to send any form or window message. Currently, its focus is on control of media applications (Winamp, Windows Media Player, Foobar2000 etc).
Please feel free to leave feedback and/or bug reports in this thread.
The complete readme is attached, and the plug-in itself can be found: