White Papers - Articles "Creating Synergistic Components with Delphi" James Callan - KOG Webzine (Page 6) Refining the Requirements Before proceeding we should better define the requirements for our disembodied button pusher. First, only one component should be used. Second, the component must leave all button events available for the application programmer. Third, it should be possible to display a macro once recorded. The programmer's interface to the macro recorder could include three methods (BeginMacro, EndMacro and Playback) that permit macro definition and playback. Two published properties (Recording and Macro) could also be used to determine when a macro is being recorded and to display recorded macros. Given the refined requirements, it is now possible to complete a design. Macros will be recorded into a string variable so that it can be easily displayed. We will use a simple boolean variable to ascertain when macros are being recorded. We will assume that forms use static controls. Thus, the application programmer will not be dynamically creating and deleting new controls on the form as is typical in form designers or drawing applications. But, some unresolved design issues still remain.