# CallbackBase2 Class (CPP)

**Header:** #include <UnigineCallback.h>


A base class for engine callbacks.


This class allows you to create your own callbacks with one or two arguments.


## CallbackBase2 Class

### Members

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## void run ( A0 a0 )

Executes the callback function with one argument.
### Arguments

- *A0* **a0** - Argument of the callback function.

## void run ( A0 a0 , A1 a1 )

Executes the callback function with two arguments.
### Arguments

- *A0* **a0** - First argument of the callback function.
- *A1* **a1** - Second argument of the callback function.