Usage:
ACTIVATE.EXE [option] [target window's title]
Usage:ACTIVATE [option] [target switch entry's title]
Options:
/A ... activate(default).
/C ... check whether the ACTIVATE.EXE itself is active.
/D ... deactivate.
/I ... ignore case.
/L ... only list target switch entry(or all switch entry).
/N ... minimize.
/O ... target is limited to only one.
/P[B] ... partial target specification(top/bottom).
/R[n][,msg] ... repeat work every n seconds till push any key. (default=10sec)
/S[class] ... appoint main window class name.
/T[class] ... appoint client window class name.
/V ... be verbose.
/W[n][+] ... wait n seconds at before end of the process. (default=1sec, '+'=put beep sound)
/X ... maximize.
/- ... stop switches scanning.
/? ... show this message.
Although only the Japanese document is prepared for ACTIVATE, what was translated into English can be read using the translation service
on WEB.
Japanese->English:

-> URL: http://www.vector.co.jp/download/file/os2/util/fh485985.html
Source: OS2.org