To answer my own question below is something that worked (AFAIK) - you will
have to search out the other ICC definitions.
type TINITCOMMONCONTROLSEX = object
dwSize:DWORD
dwICC:DWORD
const
ICC_UPDOWN_CLASS = 0x10
proc InitCommonControlsEx*(lpInitCtrls:ptr TINITCOMMONCONTROLSEX):WINBOOL
{.stdcall, dynlib: "comctl32",
importc: "InitCommonControlsEx".}
nim
