| Overload | Description | 
|---|---|
| IsExcelFile(String) | Opens the specified file and determines whether it meets the minimal requirements to be considered an Excel file. | 
| IsExcelFile(String,ExcelWorkbookType,Boolean) | Opens the specified file and determines whether it meets the minimal requirements to be considered a structured storage file containing an Excel workbook. | 
Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family