I couldn't find the correspondence table between the value of the -Category argument (Int16) of Write-EventLog cmdlet and the category shown in Event Viewer from Microsoft.
I have run this command and viewed the result in the Event Viewer and Get-EventLog cmdlet.
0..32767 | ForEach-Object { Write-EventLog -LogName Application -Source Application -EventID $_ -EntryType Information -Category $_ -Message "SOME MESSAGE" }
| Category | English | Japanese |
|---|---|---|
| 0 | None | なし |
| 1 | Devices | デバイス |
| 2 | Disk | ディスク |
| 3 | Printers | プリンター |
| 4 | Services | サービス |
| 5 | Shell | シェル |
| 6 | System Event | システム イベント |
| 7 | Network | ネットワーク |
| 8 | (8) | (8) |
| ︙ | ︙ | ︙ |
| 32767 | (32767) | (32767) |
Note that the name of Category depends on the locale of the system. You will get Devices in English (Codepage 437) environment, while デバイス in Japanese (Codepage 932) environment.
