redhat man page for xdbequeryextension

XdbeQueryExtension(3X11)					    X FUNCTIONS 					  XdbeQueryExtension(3X11)

NAME
       XdbeQueryExtension - returns the version of DBE supported by the server.

SYNOPSIS
       #include <X11/extensions/Xdbe.h>

       Status XdbeQueryExtension(
	   Display *dpy,
	   int	   *major_version_return,
	   int	   *minor_version_return)

DESCRIPTION
       Sets major_version_return and minor_version_return to the major and minor DBE protocol version supported by the server.	If the DBE library
       is compatible with the version returned by the server, this function returns non-zero.  If dpy does not support the DBE	extension,  or	if
       there  was  an  error  during communication with the server, or if the server and library protocol versions are incompatible, this function
       returns zero.  No other Xdbe functions may be called before this function.  If a client violates this rule, the effects of  all	subsequent
       Xdbe calls that it makes are undefined.

SEE ALSO
       DBE,  XdbeAllocateBackBufferName(),  XdbeBeginIdiom(),  XdbeDeallocateBackBufferName(),	XdbeEndIdiom(), XdbeFreeVisualInfo(), XdbeGetBack-
       BufferAttributes(), XdbeGetVisualInfo(), XdbeSwapBuffers().

X Version 11							    Release 6.6 					  XdbeQueryExtension(3X11)