5. Comedi reference
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## 5. Comedi reference

### 5.1. Headerfiles: `comedi.h` and `comedilib.h`

All application programs must include the header file `comedilib.h`. (This file itself includes `comedi.h`.) They contain the full interface of Comedi: defines, function prototypes, data structures.

The following Sections give more details.

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4.7. Experimental functionality | Home | 5.2. Constants and macros