I tested if it is possible to see CustomeTag through samples and I could see them. Can you please see following instruction and see if it is possible for you to work?
Start TriggerAnalyticsEventXML and send Analytics Events with custom tag.
Open AlarmEventViewer sample code and add following code in line 79 in MainForm.cs to see CustomTag -
new DataGridViewTextBoxColumn() {HeaderText = “CustomTag”,Width=50},
Start AlarmEventViewer sample and select Analytics Event. See CustomTag in the dialog.
