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volume1a
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form1.frm
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1997-12-02
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4KB
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116 lines
VERSION 5.00
Begin VB.Form Form1
Caption = "Mixer API Test"
ClientHeight = 1785
ClientLeft = 60
ClientTop = 345
ClientWidth = 4680
LinkTopic = "Form1"
ScaleHeight = 1785
ScaleWidth = 4680
StartUpPosition = 3 'Windows Default
Begin VB.TextBox Text2
Height = 375
Left = 1320
TabIndex = 3
Text = "0"
Top = 840
Width = 1335
End
Begin VB.TextBox Text1
Height = 375
Left = 1320
TabIndex = 2
Text = "0"
Top = 120
Width = 1335
End
Begin VB.CommandButton Command2
Caption = "Mic Vol"
Height = 375
Left = 120
TabIndex = 1
Top = 840
Width = 975
End
Begin VB.CommandButton Command1
Caption = "Out Volume"
Height = 375
Left = 120
TabIndex = 0
Top = 120
Width = 975
End
Begin VB.Label Label2
Height = 375
Left = 2760
TabIndex = 5
Top = 840
Width = 1815
End
Begin VB.Label Label1
Height = 375
Left = 2760
TabIndex = 4
Top = 120
Width = 1815
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim hmixer As Long ' mixer handle
Dim volCtrl As MIXERCONTROL ' waveout volume control
Dim micCtrl As MIXERCONTROL ' microphone volume control
Dim rc As Long ' return code
Dim ok As Boolean ' boolean return code
Private Sub Form_Load()
' Open the mixer with deviceID 0.
rc = mixerOpen(hmixer, 0, 0, 0, 0)
If ((MMSYSERR_NOERROR <> rc)) Then
MsgBox "Couldn't open the mixer."
Exit Sub
End If
' Get the waveout volume control
ok = GetVolumeControl(hmixer, _
MIXERLINE_COMPONENTTYPE_DST_SPEAKERS, _
MIXERCONTROL_CONTROLTYPE_VOLUME, _
volCtrl)
If (ok = True) Then
' If the function successfully gets the volume control,
' the maximum and minimum values are specified by
' lMaximum and lMinimum
Label1.Caption = volCtrl.lMinimum _
& " to " _
& volCtrl.lMaximum
End If
' Get the microphone volume control
ok = GetVolumeControl(hmixer, _
MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE, _
MIXERCONTROL_CONTROLTYPE_VOLUME, _
micCtrl)
If (ok = True) Then
Label2.Caption = micCtrl.lMinimum _
& " to " _
& micCtrl.lMaximum
End If
End Sub
Private Sub Command1_Click()
vol = CLng(Text1.Text)
SetVolumeControl hmixer, volCtrl, vol
End Sub
Private Sub Command2_Click()
vol = CLng(Text2.Text)
SetVolumeControl hmixer, micCtrl, vol
End Sub