bell.txt

使用于OS/2下的小工具的C源程序,使用于OS/2下的小工具的C源程序

                                              BELL [DUAL MODE]
     
     NAME BELL - Make an audible sound on the speaker.
     
     SYNTAX
     
     bell [frequency duration]* [/NOD] OR
     bell -F file OR
     bell /H | /?
     
     USAGE
     
     Bell is  used to  play a  tune of the given frequency and
     duration on  the speaker.  It can  be given multiple such
     pairs on  the command line or the pairs can be given in a
     file. If  the parameters are in a file, each pair must be
     on a  separate line.  That  is:  do  not  write  multiple
     frequency duration pairs to the same line in the file.
     
     Bell can  be given  a default frequency and duration with
     environment variables  BELLFREQ and BELLDUR. When bell is
     started with  parameters are  given, it  uses the  values
     given in these environment variables. If beither of these
     values or  both are  missing, and bell is started without
     parameters, it  reads the  from the  standard input. This
     can be  forced also with the /NOD-option, when environemt
     variables are set.
     
     SEE ALSO