Select File | New, Contest type: Worked All Germany Contest, Mode: CW
BUG 1: In the Contest Configuration dialog, the [?] at top right corner is disabled; clicking it should prompt: "German stations enter DOK district, others leave blank." If you leave it blank and click [OK], nothing happens, no messages, dialog doesn't close (it should display the same prompt). You have to enter something there like "DX".
Enter a German callsign and a district no. like "F43" and click [OK]
Type MSGS enter
Note that for German stations, the F2 messages of a new log is preset to $SETEXCHSENT ++$RST-- $DOK (which is OK)
Type a callsign and press Insert
BUG 2: The $DOK variable (which was never documented, but apparently worked in WT 4.14), does not send F43 or anything else.
BUG 3: Some DOK special districts are longer than 5 characters, but there is no way to log more than 5 characters in the exchange field.
See WAG Rules: http://www.darc.de/referate/dx/contest/wag/en/rules/