echo off set output_dll=%1 set game_mod_output_dll=%2 set game_mod_output_dir=%game_mod_output_dll:main.dll = % set game_mod_back=%game_mod_output_dll:~0,-3%.bak echo Creating backup at %game_mod_output_dir% COPY %output_dll% %game_mod_output_dir% DEL %game_mod_output_dll% echo Copying %output_dll% to %game_mod_output_dir% COPY %output_dll% %game_mod_output_dir% echo Removing backup at %game_mod_back% DEL %game_mod_back%