Specifies the argument that is to be passed to the specified procedure when input is available
Specifies the mask that indicates a read, write, or exception condition or some operating system dependent condition.
Specifies the procedure that is to be called when input is available.
Specifies the source file descriptor on a UNIX-based system or other operating system dependent device specification.
XtAddTimeout has been replaced by XtAppAddTimeout.
XtAddWorkProc has been replaced by XtAppAddWorkProc.