Specifies the extension to be queried. The input extension name is defined
in the header file XI.h.
DESCRIPTION
The XGetExtensionVersion request queries the version of the input
extension, and returns an XExtensionVersion structure. This structure
contains a major_version and minor_version number which can be compared
with constants defined in XI.h. Support for additional protocol
requests added to the input extension after its initial release is indicated
by a version number corresponding to the added requests. Each version
contains all the protocol requests contained by previous versions.
You should use XFree to free the XExtensionVersion structure.
STRUCTURES
This request returns an XExtensionVersion structure.
typedef struct {
int present;