| Contents | Index |
Writing an S-function basically involves creating implementations of the callback functions that the Simulink engine invokes during a simulation. For guidelines on implementing a particular callback, see the documentation for the callback in S-Function Callback Methods — Alphabetical List. For information on using callbacks to implement specific block features, such as parameters or sample times, see Implementing Block Features.
![]() | How the Simulink Engine Interacts with C S-Functions | Using S-Functions in Normal Mode Referenced Models | ![]() |

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