The following constants can be used anywhere in your code in place of the actual values:
The firstdayofweek argument has the following values:
| Constant | Value | Description |
| vbUseSystem | 0 | Use NLS API setting. |
| vbSunday | 1 | Sunday (default) |
| vbMonday | 2 | Monday |
| vbTuesday | 3 | Tuesday |
| vbWednesday | 4 | Wednesday |
| vbThursday | 5 | Thursday |
| vbFriday | 6 | Friday |
| vbSaturday | 7 | Saturday |
The firstdayofyear argument has the following values:
| Constant | Value | Description |
| vbUseSystem | 0 | Use NLS API setting. |
| VbUseSystem DayOfWeek |
0 | Use the day of the week specified in your system settings for the first day of the week. |
| VbFirstJan1 | 1 | Start with week in which January 1 occurs (default). |
| vbFirstFourDays | 2 | Start with the first week that has at least four days in the new year. |
| vbFirstFullWeek | 3 | Start with the first full week of the year. |
| Constant | Value | Description |
| vbSunday | 1 | Sunday |
| vbMonday | 2 | Monday |
| vbTuesday | 3 | Tuesday |
| vbWednesday | 4 | Wednesday |
| vbThursday | 5 | Thursday |
| vbFriday | 6 | Friday |
| vbSaturday | 7 | Saturday |