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Workbook.Open Event

Occurs when the workbook is opened.

Namespace: Microsoft.Office.Tools.Excel
Assembly: Microsoft.Office.Tools.Excel (in

public event WorkbookEvents_OpenEventHandler Open

The following code example demonstrates a handler for the Open event. The event handler maximizes the Microsoft Office Excel application window when the current workbook is opened.

private void WorkbookOpen()
    this.Open +=
        new Excel.WorkbookEvents_OpenEventHandler(

void ThisWorkbook_Open()
    this.Application.WindowState = Excel.XlWindowState.xlMaximized;