Window Subclassing

In Windows, the technique of window subclassing is used to intercept and perhaps filter Windows messages before they arrive at a particular window. When you subclass a Windows window, you are placing a new window procedure at the head of a chain of window procedures for that window.

SilverEngine was designed to intercept some messages routed to the main application window and this is achieved via the SilverEngine API routine engine_set_frame_window.

If your application will perform interactive drawing or prompting, then it must also provide an active view window via the SilverEngine API routines sdc_open, sdc_goto, and sdc_close.

The SilverEngine sample EngineShell included in the developer's distribution provides an example of how to go about establishing a main application window and an active view window for use by SilverEngine.