ecMathExpr is an ActiveX control for Visual Basic programs, for compiling and evaluating math expressions created at runtime, from within your VB projects...  
*  Compiled, runs faster than simple parser methods
*  Define any number of variables and assign values to them.
*  Pre-compile 'user-defined' functions to use in other math expressions.
*  Compile multiple math expressions that can use the pre-defined variables and user functions.
*  Evaluate (fast and repeatedly) any of the compiled expressions.
*  Arithmetic operators: ( )  +  -  *  /  ^    mod
*  Boolean operators: not, and, or, xor
*  Logical operators: =  >  <  <>  >=  <=
*  Trigonometric functions: sin, cos, tan asin, acos, atan
*  Hyperbolic trig functions: sinh, cosh, tanh asinh, acosh, atanh
*  Internal functions: int, fix, sgn, sqr, fact, nCr, nPr, min, max, rnd
*  Logarithmic and exponential functions: log, exp
*  Logical if..then..else functions: iif(condition, if_true, if_false)

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