From BigSpeed Computing:
Multi-threaded, fully self-contained ActiveX control, which lets you add zip compression capabilities to your 32-bit Windows application. It offers also a unique feature that lets your application search for files and text in all zip archives on your computer. You can customize the search parameters with a variety of filters, such as file name, date, and size. The ZIP engine is written in fast, highly-optimized assembler code. Examples are included that illustrate how to use the control with Delphi and Visual Basic.