Reads a complex number. This can be an integer, real, or a Mathematica expression with head Complex.
The complex number as an instance of the class previously designated using the ComplexType property, or null if no class has been designated.
You must first designated a class to be used for complex numbers using the ComplexType property.
|MathLinkException||If the waiting data cannot be read in this format, or on any other MathLink error.|