Forms and Macros

GemBox.Spreadsheet preserves Form Controls and Macros when reading XLSX file format.

Excel form controls and macros preserved with GemBox.Spreadsheet
Screenshot of Excel form controls and macros preserved with GemBox.Spreadsheet
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using GemBox.Spreadsheet;

class Program
{
    static void Main()
    {
        // If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");

        var workbook = ExcelFile.Load("%InputFileName%");

        workbook.Save("Forms and Macros.xlsm");
    }
}

Imports GemBox.Spreadsheet

Module Program

    Sub Main()

        ' If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY")

        Dim workbook = ExcelFile.Load("%InputFileName%")

        workbook.Save("Forms and Macros.xlsm")
    End Sub
End Module

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If you want to try the GemBox.Spreadsheet yourself, you can download the free version. It delivers the same performance and set of features as the professional version, but with some operations limited. To remove the limitation, you need to purchase a license.