---
name: "xcb_dbe_query_version"
section: "3"
platform: "linux"
package: "libxcb"
version: "1.17.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/xcb_dbe_query_version"
---

# xcb\_dbe\_query\_version(3)

Queries the version of this extension

## NAME

xcb\_dbe\_query\_version - Queries the version of this extension

## SYNOPSIS

**#include \<xcb/dbe.h\>**

### Request function

xcb\_dbe\_query\_version\_cookie\_t **xcb\_dbe\_query\_version**(xcb\_connection\_t \**conn*, uint8\_t *major\_version*, uint8\_t *minor\_version*);

### Reply datastructure

```

typedef struct xcb_dbe_query_version_reply_t {
    uint8_t  response_type;
    uint8_t  pad0;
    uint16_t sequence;
    uint32_t length;
    uint8_t  major_version;
    uint8_t  minor_version;
    uint8_t  pad1[22];
} xcb_dbe_query_version_reply_t;
```

### Reply function

xcb\_dbe\_query\_version\_reply\_t \***xcb\_dbe\_query\_version\_reply**(xcb\_connection\_t \**conn*, xcb\_dbe\_query\_version\_cookie\_t *cookie*, xcb\_generic\_error\_t \*\**e*);\

## REQUEST ARGUMENTS

- *conn*

  The XCB connection to X11.

- *major\_version*

  The major version of the extension. Check that it is compatible with the XCB\_DBE\_MAJOR\_VERSION that your code is compiled with.

- *minor\_version*

  The minor version of the extension. Check that it is compatible with the XCB\_DBE\_MINOR\_VERSION that your code is compiled with.

## REPLY FIELDS

- *response\_type*

  The type of this reply, in this case *XCB\_DBE\_QUERY\_VERSION*. This field is also present in the *xcb\_generic\_reply\_t* and can be used to tell replies apart from each other.

- *sequence*

  The sequence number of the last request processed by the X11 server.

- *length*

  The length of the reply, in words (a word is 4 bytes).

- *major\_version*

  TODO: NOT YET DOCUMENTED.

- *minor\_version*

  TODO: NOT YET DOCUMENTED.

## DESCRIPTION

Queries the version of this extension. You must do this before using any functionality it provides.

## RETURN VALUE

Returns an *xcb\_dbe\_query\_version\_cookie\_t*. Errors have to be handled when calling the reply function *xcb\_dbe\_query\_version\_reply*.

If you want to handle errors in the event loop instead, use *xcb\_dbe\_query\_version\_unchecked*. See **[xcb-requests(3)](/xcb-requests/3.md)** for details.

## ERRORS

This request does never generate any errors.

## SEE ALSO

[**xcb-requests**(3)](/xcb-requests/3.md)

## AUTHOR

Generated from dbe.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.