[VFP] SET BELL TO not implemented

[cpyrgas]

According to https://hackfox.github.io/section4/s4g127.html, there exist the following SET BELL related commands:

SET BELL ON | OFF
SET BELL TO [ nFreq, nSeconds ]    && MS-DOS version
SET BELL TO [ cWavFile, nNothing ] && Windows, VFP 3 & 5 version
SET BELL TO [ cWavFile ]           && VFP 6 and later, at last!
cBellOnOff = SET( "BELL" )
cWavFile = SET( "BELL" , 1 ) // returns the wav file

In X#, currently only the first form (SET BELL ON/OFF) is supported, the rest are not implemented.

[RobertvanderHulst]

I think the comment on the hackfox site describes what I think about this command:

SET BELL can be toggled to determine if you want to annoy your end users endlessly and drive them to an early grave by beeping at them when they reach the end of a field. To further annoy them, you can change the bell’s exact sound (or the sound file it plays) as well. The chosen sound is also played when the CHR(7) character is displayed to the screen.

I am not sure if we need to implement this.
We can add the UDC but IMHO it should either generate a warning about a non-supported feature, or simply generate no code.

[cpyrgas]

That's what I think about it, too, but others for some bizarre reason may want to use it. What I'm not sure, is if this command decides also if a beep is heard when you type Chr(7) or send it to a MessageBox(). The description seems to indicate that SET BELL does not affect this, but I wasn't able to confirm this or not, FoxPro for me never seems to want to play a sound anyway...

Let's keep it on hold until someone explicitly asks for this.