How can I get data from an environment variable in sed SCRIPT FILE? (under MS-DOS, not UNIX)

[krondor]

I'm using GNU SED for windows
and made a batch file like this...

    Set myTemp_Value="Hello world"

    SED -n -f mySedScript.TXT   targetFile.TXT


but...
How can i use DOS Environment variable in SED Script File?


Is there no way to use myTemp_Value in mySedScript.TXT ??
as far as i know,  an environment variable is available in unix.