## CustomFunctionDefinition class


Definition of custom function for calculating with user's custom engine.

```cpp
class CustomFunctionDefinition
```

## Methods

| Method | Description |
| --- | --- |
| [CustomFunctionDefinition()](./customfunctiondefinition/) | Default constructor. |
| [CustomFunctionDefinition(const CustomFunctionDefinition\& src)](./customfunctiondefinition/) |  |
| virtual [GetArrayModeParameters(const U16String\& functionName)](./getarraymodeparameters/) | Gets the indices of given custom function's parameters that need to be calculated in array mode. |
| virtual [GetArrayModeParameters(const char16_t* functionName)](./getarraymodeparameters/) | Gets the indices of given custom function's parameters that need to be calculated in array mode. |
| [IsNull()](./isnull/) const | Checks whether the implementation object is nullptr. |
| explicit [operator bool()](./operator_bool/) const | operator bool() |
| [operator=(const CustomFunctionDefinition\& src)](./operator_asm/) |  |
| [~CustomFunctionDefinition()](./~customfunctiondefinition/) | Destructor. |
## Fields

| Field | Description |
| --- | --- |
| [_impl](./_impl/) | The implementation object. |
## See Also

* Namespace [Aspose::Cells](../)
* Library [Aspose.Cells for C++](../../)