Getting events of another application

Question

In my c# application I need to detect when a user clicks one of two buttons in a different, third party application.

I am able to get the Handle of the application b

Answer 1

Global system hooks allow an application to intercept Windows messages intended for other applications. This has always been difficult to implement in C#. This project on Codeplex attempts to implement global system hooks by creating a DLL wrapper in C++ that posts messages to the hooking application's message queue. Put simply, this lets you implement any type of global Windows hook from managed code: http://www.codeproject.com/KB/system/WilsonSystemGlobalHooks.aspx