# set\_default\_sreg\_value

```
Set default segment register value for a segment
  ea      - any address in the segment
            if no segment is present at the specified address
            then all segments will be affected
  reg     - name of segment register
  value   - default value of the segment register. -1-undefined.

success set_default_sreg_value(long ea, string reg, long value);
```


---

# 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/9.0/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/308.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.