# set\_struc\_idx

change structure index id - structure type ID index - new index of the structure See [get\_first\_struc\_idx](/8.4/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/371.md)() for the explanation of structure indices and IDs. returns: !=0 - ok

long set\_struc\_idx(long id, long index);


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.hex-rays.com/8.4/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/395.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
