VintaSoft Twain .NET SDK v10.2
How to set value of device capability?

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

Public Sub SetDuplexEnabledCapValue(ByVal device As Vintasoft.Twain.Device)
    ' open the device
    device.Open()

    ' get reference to object that manipulates DuplexEnabled capability
    Dim duplexEnabledCap As Vintasoft.Twain.DeviceCapability = device.Capabilities.Find(Vintasoft.Twain.DeviceCapabilityId.DuplexEnabled)
    ' if DuplexEnabled capability supported
    If duplexEnabledCap IsNot Nothing Then
        ' set value of DuplexEnabled capability
        duplexEnabledCap.SetValue(True)
    End If
End Sub
              
public void SetDuplexEnabledCapValue(Vintasoft.Twain.Device device)
{
    // open the device
    device.Open();
    
    // get reference to object that manipulates DuplexEnabled capability
    Vintasoft.Twain.DeviceCapability duplexEnabledCap = device.Capabilities.Find(Vintasoft.Twain.DeviceCapabilityId.DuplexEnabled);
    // if DuplexEnabled capability supported
    if (duplexEnabledCap != null)
    {
        // set value of DuplexEnabled capability
        duplexEnabledCap.SetValue(true);
    }
}