How can I tell the windows mobile CE 4.2 device to raise a certain beep 
tone.  Is this possible?  When the user is scanning bar codes, they may not 
be looking at the screen for errors.  I'd like to raise an "Error" tone so 
the user can audibly hear there was an input error and then look on to the 
display for intructions.  Has anyone tried this?

You can P/Invoke MessageBeep (see the SDK for details) to play default beep 
noises, or PlaySound to play any .wav file. There are also third-party 
wrapper classes, I wrote SystemSounds and SoundPlayer classes for .NETCF 
which appear in Mobile In The Hand 
(http://inthehand.com/content/Mobile.aspx) and elsewhere. The P/Invokes are 
below:-

[DllImport("coredll.dll", EntryPoint="MessageBeep", SetLastError=true)]
  private static extern void MessageBeep(int type);

usage:-

MessageBeep(0);


[DllImport("coredll.dll", EntryPoint="PlaySoundW", SetLastError=true) ]
  private extern static bool PlaySound(string lpszName, IntPtr hModule, int 
dwFlags);

usage:-

PlaySound("\\windows\\mywav.wav", IntPtr.Zero, 0x20000);

Peter

-- 
Peter Foot
Microsoft Device Application Development MVP
www.peterfoot.net | www.inthehand.com
In The Hand Ltd - .NET Solutions for Mobility


"Dan"  wrote in message 
news:O3LRwSWzHHA.3940@TK2MSFTNGP05.phx.gbl...

> How can I tell the windows mobile CE 4.2 device to raise a certain beep 
> tone.  Is this possible?  When the user is scanning bar codes, they may 
> not be looking at the screen for errors.  I'd like to raise an "Error" 
> tone so the user can audibly hear there was an input error and then look 
> on to the display for intructions.  Has anyone tried this?
>