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background sound in a vb program

Posted on 2000-05-10
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how do i get a sound to play in aloop while other activites are going on in a vb app?
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Question by:gerrymcd
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AzraSound earned 50 total points
ID: 2797049
Private Declare Function PlaySound Lib "winmm.dll" Alias "PlaySoundA" (ByVal lpszName As String, ByVal hModule As Long, ByVal dwFlags As Long) As Long

To Use:

PlaySound sFile, 0, SND_NODEFAULT Or SND_FILENAME Or SND_ASYNC Or SND_LOOP


where sFile is the full path to the file you want to play



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by:AzraSound
ID: 2797055
here are the constants declarations:

Private Const SND_NODEFAULT = &H2        
Private Const SND_FILENAME = &H20000    
Private Const SND_ASYNC = &H1        
Private Const SND_LOOP = &H8        
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by:mdougan
ID: 2797139
If you wanted to play the sound while other things are going on in the program, then you either have to create a Thread, and have the thread call the PlaySound function listed above, or, you can have a timer on the form, and when you set the Timer's enabled property, then in the Timer Event, you'll first set the Enabled property of the timer to false, then call the PlaySound function, then set the Enabled property back to true (so it will play the sound again).

In VB 5 you could use the CreateThread API to create a thread, but Microsoft has provided less support for CreateThread under VB 6, so, the same code may or may not work for you.  I have a sample thread progam I can send if you post an e-mail address.

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by:AzraSound
ID: 2797160
the snd_async and snd_loop constants take care of everything
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by:AzraSound
ID: 2797225
here are the definitions of the constants being used:

SND_FILENAME
The pszSound parameter is a filename

SND_NODEFAULT
No default sound event is used. If the sound cannot be found, PlaySound returns silently without playing the default sound

SND_LOOP
The sound plays repeatedly until PlaySound is called again with the pszSound parameter set to NULL. You must also specify the SND_ASYNC flag to indicate an asynchronous sound event

SND_ASYNC
The sound is played asynchronously and PlaySound returns immediately after beginning the sound. To terminate an asynchronously played waveform sound, call PlaySound with pszSound set to NULL






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by:PBuck
ID: 2797419
First of all AzraSound, you make me sick with all your wonderful website links in pratically all the questions here :-)  How do ou manage all the links?

Secondly, this is a great answer.  I was using something similar (but it wasn't looped)

Now, can you give a sample of a statment to stop the asynchronously played sound?  What do you mean,"call PlaySound with pszSound set to NULL"

Thanks in advance!  AzraSound

Thank-you gerrymcd for letting me eves-drop.







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by:AzraSound
ID: 2797449
the pszSound referred to is from the msdn help where all references are to the C syntax...it is actually referring to the lpszName in the VB declaration of the api call..so pass vbNullString to the function to stop the sound
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by:AzraSound
ID: 2797566
as for my plethora of links...   =)
being a self-taught vb-er, i found all my resources on the web, so i have a pretty hefty favorites folder full of all the links that i've found useful in the past while learning the language...its pretty amazing how much stuff is out there...
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by:PBuck
ID: 2797591
I agree with the amount of information out there.  I have started a small but useful favorites folder - but some of the links you post I would not have found.

Thanks for the sound function (and how to stop it).

I am sure I will see you again soon!

gerrymcd - sorry for cluttering your question page.
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by:gerrymcd
ID: 2805717
how do u keep this sound going while another one plays?

ur a guru at sound in vb nice one again!
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by:AzraSound
ID: 2805918
that is not so simple...i would send you a sample project but you gave me a 'B'   =oP   j/k
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