Optional: The argument is not mandatory.ByRef: The argument is passed by reference. ByRef is the default.ByVal: The argument is passed by value. Its value can be modified by the called routine.char: Type declaration character.typename: Primitive data type name. Library or module defined types can also be specified.= expression: Specify a default value for the argument, matching its declared type. Optional is necessary for each argument specifying a default value.ParamArray: Use ParamArray when the number of parameters is undetermined. A typical scenario is that of a Calc user-defined function. Using ParamArray should be limited to the last argument of a routine.UsingParamArray or = expression require Option Compatible to be placed before the executable program code in a module.When using Option VBASupport 1, Optional arguments with no default value (= expression) are initialized according to their data type, except if Variant.
array fragment
array fragment( [[start To] end], .. )
Parameters
start: Lower bound of a dimension.end: Upper bound of a dimension.Multiple dimensions for an array are denoted using comma (,) sign.
typename fragment
primitive data types fragment{Boolean|Byte|Currency|Date|Double|Integer|Long|Object|Single|String|Variant}