System Volume

[Tal Zur]

does anybody know how to change the main sound volume of the system...
i cant find the api call.

[Innofin]

Declare Function auxSetVolume Lib "winmm.dll" (ByVal uDeviceID As Long, ByVal dwVolume As Long) As Long

This example will set the volume of auxiliary audio device 0 to 50%.

Dim retval As Long

' Set the volume of both channels (if a second exists) to 50%
retval = auxSetVolume(0, &H80008000) ' both words are set

[Wak]

I realized that it hold the value of a long to 64000.... and then it wraps around, but how come sometimes it centers it to the left speakers and other times to the right speaker?? This is if I just use a long variable in the function?? Any ideas?

[Dreamlax]

Try This:

Dim lngSetVolTo As Long
Dim strTemp As String
lngSetVolTo = X / 100 * 65536
strTemp = Hex(lngSetVolTo + 65536)
If strTemp <> "20000" Then
 strTemp = Right(strTemp, 4)
 lngSetVolTo = CLng("&H" & strTemp & strTemp)
 auxSetVolume Y, lngSetVolTo
Else
 auxSetVolume Y, -1
End If

X is the percentage of volume, and Y is the device number.

[Trav]

dreamlax i cant get your snippet to work

how does it work or can u make a zip pls

thanks trav

[Megatron]

See this link.