How to set value of device capability

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Example: Here is an example that shows how to enable duplex using the device capability.

VB.NET

Private VSTwain1 As New VintaSoftTwain()


Private Sub SetDuplexEnabledCapValue()
    ' open the device manager
    If Not VSTwain1.DeviceManager_Open() Then
        Console.WriteLine(VSTwain1.errorString)
        Exit Sub
    End If

    ' open the device
    If Not VSTwain1.Device_Open Then
        Console.WriteLine(VSTwain1.errorString)
        Exit Sub
    End If

    ' specify that we will work with CAP_DUPLEXENABLED capability
    VSTwain1.Device_Cap_Id = 4115
    ' if capability is supported
    If VSTwain1.Device_Cap_IsSupported() Then
        ' specify container type for capability value
        VSTwain1.Device_Cap_ValueContainerType = DEVICECAPABILITYVALUECONTAINERTYPE.DEVICECAPABILITYVALUECONTAINERTYPE_OneValue
        ' specify new capability value
        VSTwain1.Device_Cap_Value = 1 ' True
        ' set capability value
        VSTwain1.Device_Cap_Set()
    End If

    ' close the device
    VSTwain1.Device_Close()

    ' close the device manager
    VSTwain1.DeviceManager_Close()
End Sub

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