public void GetActiveAgentsForCampaignAsync(
	CampaignId campaignId,
	EventHandler<AsyncCompletedEventArgs<Collection<string>>> callback,
	Object userState
)

Public Sub GetActiveAgentsForCampaignAsync ( _
	campaignId As CampaignId, _
	callback As EventHandler(Of AsyncCompletedEventArgs(Of Collection(Of String))), _
	userState As Object _
)