Coherent FieldMaxII-TOP Manuel d'utilisateur télécharger pdf (Page 79)

Host Interface

Private Property Let IFM2DeviceEvents_ZeroDeviceTimeoutCounter( _

ByVal RHS As Integer)

m_ZeroDeviceTimeoutCounter = RHS

End Property

Status Change

Notifications

Status change notifications are dispatched to the applica-

tion code through the IFM2DeviceEvents_Notify-

DeviceStatus callback method. The CallbackData and

DevicesList objects are passed to the application. Status

change event types are steered by testing the Callback-

Data.CallbackEvent string. The CallbackEvent string

will be one of the following:

• “MeterAdded”

• “MeterRemoved”

The DevicesList is updated with each call to this callback

method. A reference to the cFM2Device object from

which this callback comes is obtained by indexing into

the DevicesList collection through the DevicesList.Item

search method using the string version of Callback-

Data.DeviceIndex as the search key.

The data check timer must be started for the new devices

list when a meter is added.

The following Visual Basic 6.0 code shows how to

obtain reference to the cFM2Device object and start the

data check timer when a meter is added:

‘Declaration:

Dim ThisDevice As IFM2Device

‘Executable code:

‘Get the current device from the collection

Set ThisDevice = m_DevicesList.Item(CallbackData.DeviceIndex)

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Coherent FieldMaxII-TOP Manuel d'utilisateur Page 79