Handle to existing Excel document

[Gintaras]

I don't know why fails to get active workbook. Try this:
Macro Macro1571

Code:

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;/exe 1

ExcelSheet es1

;this code is simplified Init version
Excel.Application xlApp._getactive
es1=xlApp.ActiveSheet
out es1 ;;is it 0?

es1.SetCell("OK" 1 22)