XNextRequest() XNextRequest() Name XNextRequest, NextRequest - return serial number of next request. Synopsis unsigned long XNextRequest(display) Display *display; Arguments display Specifies a connection to an X server; returned from XOpenDisplay(). Returns The serial number. Description XNextRequest() extracts the full serial number that Xlib will use for the next request. Serial numbers are maintained separately for each display connection. The C language macro NextRequest() is equivalent and slightly more efficient. See Also XLastKnownRequestProcessed(). Xlib - Macro Equivalents XNextRequest()