.Bat = Remplacer les espaces d'une variable par des _

Variable Edit/Replace

Use the syntax below to edit and replace the characters assigned to a string variable.

Syntax
      %variable:StrToFind=NewStr%

      %~[param_ext]$variable:Param

Key
   StrToFind    : The characters we are looking for
   NewStr       : The chars to replace with (if any)
   variable     : The environment variable
   param_ext    : Any filename Parameter Extension
   Param        : A command line parameter (e.g. 1)

C:> set chemin=\a a\b b\c c\
C:> set nc=%chemin: =_%
C:> echo %nc%
\a_a\b_b\c_c\