No matter what kind of designing tool you select (Visual C++, Visual Basic, Delphi, and so on). You can use the Paq key log engine to build a key logger product, or add a key log function to your product with several lines of code. Paq KeyLog engine is a keystroke recorder engine newly produced in 2003. It can log all keyboard events and runs invisibly and quickly (quietly). It also can run automatically when computer starts. This engine is suited for designing key logger software for the investigative needs of law enforcement, government, business, and private individuals.