46 lines
1.5 KiB
Markdown
46 lines
1.5 KiB
Markdown
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#### VBA and Macros
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VBA Macros are stored in a special data blob that is exposed in the `vbaraw`
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property of the workbook object when the `bookVBA` option is `true`. They are
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supported in `XLSM`, `XLSB`, and `BIFF8 XLS` formats. The supported format
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writers automatically insert the data blobs if it is present in the workbook and
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associate with the worksheet names.
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<details>
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<summary><b>Custom Code Names</b> (click to show)</summary>
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The workbook code name is stored in `wb.Workbook.WBProps.CodeName`. By default,
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Excel will write `ThisWorkbook` or a translated phrase like `DieseArbeitsmappe`.
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Worksheet and Chartsheet code names are in the worksheet properties object at
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`wb.Workbook.Sheets[i].CodeName`. Macrosheets and Dialogsheets are ignored.
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The readers and writers preserve the code names, but they have to be manually
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set when adding a VBA blob to a different workbook.
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</details>
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<details>
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<summary><b>Macrosheets</b> (click to show)</summary>
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Older versions of Excel also supported a non-VBA "macrosheet" sheet type that
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stored automation commands. These are exposed in objects with the `!type`
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property set to `"macro"`.
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</details>
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<details>
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<summary><b>Detecting macros in workbooks</b> (click to show)</summary>
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The `vbaraw` field will only be set if macros are present, so testing is simple:
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```js
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function wb_has_macro(wb/*:workbook*/)/*:boolean*/ {
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if(!!wb.vbaraw) return true;
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const sheets = wb.SheetNames.map((n) => wb.Sheets[n]);
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return sheets.some((ws) => !!ws && ws['!type']=='macro');
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}
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```
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</details>
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