MMControl
in [Visual Basic]
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From: Rencie on 5 Sep 2005 19:02 Yes, please. With regards to your sndPlaySound (since I also tried it), I don't know how to make it stop while it's playing. How do I make it stop while it's currently playing?
From: MikeD on 5 Sep 2005 20:09 "Rencie" <Rencie(a)discussions.microsoft.com> wrote in message news:06B85D60-4556-43E2-BC74-ED5EA4C6C432(a)microsoft.com... > > > Yes, please. With regards to your sndPlaySound (since I also tried it), I > don't know how to make it stop while it's playing. How do I make it stop > while it's currently playing? I take it you're asking this regarding .wav files. As stated, sndPlaySound (and, IMO, you really should be using PlaySound rather than sndPlaySound) will only play .wav files. Since you've been focusing on midi files, I can only assume you want to know this for future purposes when you might be using .wav files. To stop a sound that was started IN YOUR APP with PlaySound (or sndPlaySound), that sound must have been started asynchronously. That means the functions returns immediately after playback begins. By default, PlaySound does not return until playback has finished. To play the sound asynchronously, you must specify the SND_ASYNC flag when you call the function. To stop that sound, and you can only stop that same sound, call PlaySound again, but pass the intrinsic constant vbNullString for the lpszName parameter. Here's an example: -----BEGIN CODE Option Explicit Private Declare Function PlaySound Lib "winmm.dll" Alias "PlaySoundA" (ByVal lpszName As String, ByVal hModule As Long, ByVal dwFlags As Long) As Long Private Const SND_FILENAME = &H20000 ' name is a file name Private Const SND_ASYNC = &H1 ' play asynchronously Private Const SND_LOOP = &H8 ' loop the sound until next sndPlaySound Private Const SND_NODEFAULT = &H2 ' silence not default, if sound not found Private Sub Form_Click() Call PlaySound(vbNullString, 0&, SND_ASYNC) End Sub Private Sub Form_Load() Dim sFilename As String sFilename = "H:\WinXP\media\ding.wav" Call PlaySound(sFilename, 0&, SND_FILENAME Or SND_ASYNC Or SND_NODEFAULT Or SND_LOOP) End Sub ----END CODE In the above code, I hard-coded MY Windows directory. NEVER do this in your actual code because you can't assume where Windows is installed on any given system. Change the code above to use whatever folder you've installed Windows to and remember it's just to TEST this example code. In production, you need to use code like I posted earlier in this thread to determine at runtime what the Windows directory actually is. What this code does is loop playback of Windows' ding.wav file immediately upon the form loading. The "ding" sound will continue to loop until you click the form and then it will stop.
From: Martin Walke on 6 Sep 2005 05:30
Rencie, Here's some code to use the MMControl and make it loop. To be honest, we stopped using the MMControl long time ago in favour of the ActiveMovie control, due to performance issues. Private Sub Form_Load() With MMC1 .Visible = False .UpdateInterval = 500 ' check position every 500ms (i.e. call StatusUpdate) .TimeFormat = 0 .FileName = "C:\WINDOWS\Media\flourish.mid" .Notify = False ' don't use callbacks (Done event) .Wait = True ' wait for each command to finish before moving on .Shareable = False ' Open the MCI device. .Command = "Open" .Command = "play" End With End Sub Private Sub MMC1_StatusUpdate() With MMC1 If .Position >= .Length - 5 Then .Command = "stop" .Command = "seek" .Command = "play" End If End With End Sub The -5 is there 'just in case' the MCI control fails to report the exact position correctly (which can happen). Mike mentioned the PlayCompleted event. That's only activated when using the buttons on the actual controls. One of the problems with MCI is the time delay between issueing commands and activation. That's one of the reasons why we moved to AMovie.ocx. It's still not the best but for most situations it'll do. :) HTH Martin "Rencie" <Rencie(a)discussions.microsoft.com> wrote in message news:06B85D60-4556-43E2-BC74-ED5EA4C6C432(a)microsoft.com... > > > Yes, please. With regards to your sndPlaySound (since I also tried it), I > don't know how to make it stop while it's playing. How do I make it stop > while it's currently playing? |