Agilent Technologies InfiniiVision 5000 Series - Page 743

Programming Examples 12
Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Guide 743
nViStatus = visa32.viFlush(m_nSession, visa32.VI_READ_BUF)
CheckVisaStatus(nViStatus)
Return length
End Function
Private Sub OpenResourceManager()
Dim nViStatus As Integer
nViStatus = visa32.viOpenDefaultRM(Me.m_nResourceManager)
If nViStatus < visa32.VI_SUCCESS Then
Throw New _
ApplicationException("Failed to open Resource Manager")
End If
End Sub
Private Sub OpenSession()
Dim nViStatus As Integer
nViStatus = visa32.viOpen(Me.m_nResourceManager, _
Me.m_strVisaAddress, visa32.VI_NO_LOCK, _
visa32.VI_TMO_IMMEDIATE, Me.m_nSession)
CheckVisaStatus(nViStatus)
End Sub
Public Sub SetTimeoutSeconds(ByVal nSeconds As Integer)
Dim nViStatus As Integer
nViStatus = visa32.viSetAttribute(Me.m_nSession, _
visa32.VI_ATTR_TMO_VALUE, nSeconds * 1000)
CheckVisaStatus(nViStatus)
End Sub
Public Sub CheckVisaStatus(ByVal nViStatus As Integer)
' If VISA error, throw exception.
If nViStatus < visa32.VI_SUCCESS Then
Dim strError As New StringBuilder(256)
visa32.viStatusDesc(Me.m_nResourceManager, nViStatus, strError)
Throw New ApplicationException(strError.ToString())
End If
End Sub
Public Sub Close()
If m_nSession <> 0 Then
visa32.viClose(m_nSession)
End If
If m_nResourceManager <> 0 Then
visa32.viClose(m_nResourceManager)
End If
End Sub
End Class
End Namespace