Find every chart on the workbook's visible worksheets, and which one is active.
A hidden worksheet's charts are left out: no one can see or activate them.
The batch's request context.
The charts, in tab order and then the order Excel lists them in, and the active chart's id, or null when no chart is active.
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Find every chart on the workbook's visible worksheets, and which one is active.
A hidden worksheet's charts are left out: no one can see or activate them.