/// <summary>
/// add or reuse a tracker for the given clientID
/// </summary>
/// <param name="AClientID"></param>
/// <param name="ACaption"></param>
/// <param name="AAbsoluteOverallAmount"></param>
/// <returns></returns>
static public TProgressState InitProgressTracker(string AClientID, string ACaption, decimal AAbsoluteOverallAmount = 100.0m)
{
TProgressState state = new TProgressState();
state.AbsoluteOverallAmount = AAbsoluteOverallAmount;
state.Caption = ACaption;
// First clear all progress trackers. We cannot have too many variables in the session. We only work with one progress tracker per session.
TSession.ClearVariables(PROGRESSTRACKER);
TSession.SetVariable(PROGRESSTRACKER + AClientID, state);
return(state);
}