For future searchers, I still had issues using the string above - I ended up with garbage in my registry entry. I was missing the info from here, specifically that characters have to be 2 bytes wide, so 6d becomes 6d,00.
That worked, thanks for the quick response. Working string: WriteRegMultiStr /REGEDIT5 HKLM "SOFTWARE\WOW6432Node\Key1\Key2" "Key3" 6d,79,45,6c,65,63,74,72,6f,6e,41,70,70,2e,65,78,65,00,00,00,00 It also worked (compiled) with HKLM64
That worked, thanks for the quick response. Working string: WriteRegMultiStr /REGEDIT5 HKLM "SOFTWARE\WOW6432Node\Key1\Key2" "Key3" 6d,79,45,6c,65,63,74,72,6f,6e,41,70,70,2e,65,78,65,00,00,00,00 It also worked compiled with HKLM64
WriteRegMultiStr syntax giving unhelpful error