Callbacks Allow Applications to support C calling convention and selected interrupt level callbacks. Callbacks allow Windows to call functions in your application given a function address. While the AddressOf operator now allows use of callbacks from Visual Basic, you might be surprised to find there are still applications for our callback control. SpyWorks includes a callback control that can be used to provide a callback function address to API and application functions that require it. An event in the callback control is raised whenever the function address is called.
Some callback functions require the 'C' calling convention.
Examples are multimedia timer callbacks. Also retrieve a list of all windows for a specific process or all child windows of a specific window.