Represents a user-defined or built-in function which can be called by the script.
Calls the function.
Func.(Parameters)
Parameters and return value are defined by the function.
This syntax is also valid if Func is a function name or a user-defined object which implements __Call.
Returns the function's name.
Func.Name
Returns true if the function is built-in and false otherwise.
Func.IsBuiltIn
Returns the number of required parameters.
Func.MinParams
Returns the number of formally-declared parameters for a user-defined function or maximum parameters for a built-in function.
Func.MaxParams
If the function is variadic, the return value indicates the maximum number of parameters which can be accepted by the function without overflowing into the "variadic*" parameter.
Determines whether a parameter is ByRef.
Func.IsByRef(ParamIndex)
| ParamIndex | Optional: the one-based index of a parameter. If omitted, the return value indicates whether the function has any ByRef parameters. |
| Returns | An empty string if the function is built-in or ParamIndex is invalid; otherwise, a boolean value indicating whether the parameter is ByRef. |
Determines whether a parameter is optional.
Func.IsOptional(ParamIndex)
| ParamIndex | Optional: the one-based index of a parameter. If omitted, the return value indicates whether the function has any optional parameters. |
| Returns | An empty string if ParamIndex is invalid; otherwise, a boolean value indicating whether the parameter is optional. |
Parameters do not need to be formally declared if the function is variadic. Built-in functions are supported.