When multiple workbooks are open simultaneously, this determines whether the user will see a single entry for Excel in the taskbar or a separate entry in the taskbar for each open workbook.
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | Software\Policies\Microsoft\Office\12.0\Excel\Options |
| Value Name | ShowWindowsInTaskbar |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |