rem A.txtA݂ȂꍇAJShowDlgŃ_CAO\܂B
rem ݂ꍇɂ́AA.txt̓e_CAOŕ\܂B

:LOOP
if exist A.txt goto SHOWTXT
JShowDlg.exe /t:"mFI" /a /o:1 "A.txt݂܂B Č܂H"
set DlgRtn=%errorlevel%
if %DlgRtn%==1 goto LOOP
if %DlgRtn%==3 goto LOOP
exit

:SHOWTXT
JShowDlg.exe /d:OK /a /f "A.txt"
exit