This document describes various conversion functions in Visual Basic that change the data type of an expression. It lists functions like Asc, Chr, CBool, CByte, CCur, CDate, CDbl, CInt, CLng, CSng, CStr, Hex and Oct and provides a brief explanation of what each function does to convert an expression to a different data type variant like Boolean, Byte, Currency, Date, Double, Integer, Long, Single or String.