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Editing the data set should be fairly straightforward:
Private Sub ChangeDataset() Dim MyDatasets As Datasets Dim MyDataset As PIExpressionDataset Set MyDatasets = ThisDisplay.Datasets Set MyDataset = MyDatasets.GetDataset("UPPER LIMIT") MyDataset.Expression = "<new value>" MyDatasets.SetDataset MyDataset End Sub
By the way, what is your end goal for changing the data set? Maybe there might be a better way to implement it so that you do not need code to change it at all.
Hi Gavin Chen,
Thanks for you coding. My only goal is using using a form(user can select 1 of 32 units show in the form). When user click one of them, I will read the ini file to make different limit for different unit, and then open a common trend to show a limit line in trend.