ZylTimer is a high resolution, long-term Delphi & C++Builder timer component which provides a higher precision than the standard Delphi / C++ Builder TTimer component. TTimer component which ships with Delphi & C++Builder uses the Windows Message Queue to generate the OnTimer event. Due to this approach it's impossible to get accurate timer intervals smaller than 15 milliseconds. ZylTimer is a thread based timer and due to this architecture provides a higher precision (1-2 milliseconds), which is inevitable in time critical applications. The standard TTimer component uses the SetTimer API function, so the interval is limited to 2147483647 milliseconds (about 25 days). ZylTimer is a thread based timer and the interval could be set even to hundred years if necessary. It is important to understand that the accuracy of timers is limited. Windows is not a real-time operating system (except Windows CE) and it is not reasonable to expect timers to handle exactly very small time intervals.

ZylIdleTimer is a Delphi & C++Builder component which lets you to take actions after a specified system-wide (related to the whole system) or application (related only to the application) idle time or to check the time interval of user inactivity. System Idle time is the time interval of full user inactivity. In this interval any user action is missing on the computer, like pressing a key of the keyboard or moving the mouse or pressing a mouse button or rotating the scroll.