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x11 R6 Technical Reference
XQueryExtension Extension Function
Purpose
Determines whether the named extension function is present.
Library
Enhanced X-Windows Library (libX11.a)
C Syntax
Bool XQueryExtension(DisplayPtr, Name, MajorOpCode, FirstEvent, FirstError)
Display *DisplayPtr;
char *Name;
int *MajorOpCode;
int *FirstEvent;
int *FirstError;
Description
The XQueryExtension extension function determines whether the named extension function is present. Any of the following are specific to the extension function:
- Minor op code
- Request formats
- Event formats
- Additional data in errors formats.
Parameters
| DisplayPtr |
Specifies the display device. |
| FirstError |
Specifies the returned base error code for the named extension function or the value of 0 (zero). |
| FirstEvent |
Specifies the returned base event type code for the named extension function or the value of 0. |
| MajorOpcode |
Specifies the returned major operation code for the named extension function or the value of 0. |
| Name |
Specifies the name of an extension function in the form of a case-sensitive ASCII string. |
Related Information
Using Extensions in
AIXwindows in AIX Version 4.3 AIXwindows Programming Guide.
AIXwindows Overview
for Programmers in AIX Version 4.3 AIXwindows Programming Guide.
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