这是我发现的一个使值小写的代码，但很好奇如何在没有 CALL 的情况下只使用一个变量：
SET String=Hello, how are you ?
CALL :LoCase String
:LoCase
FOR %%i IN ("A=a" "B=b" "C=c" "D=d" "E=e" "F=f" "G=g" "H=h" "I=i" "J=j" "K=k" "L=l" "M=m" "N=n" "O=o" "P=p" "Q=q" "R=r" "S=s" "T=t" "U=u" "V=v" "W=w" "X=x" "Y=y" "Z=z") DO CALL SET "%1=%%%1:%%~i%%"
GOTO:EOF