Note that you can also use RC from the Microsoft Platform SDK.
GRC compiles your resource scripts to a ".res" file.
Syntax:
GRC.EXE <options> file.rc
options:
-o res_file name of the .res output file
-l id language id
-v verbose mode
-r build only .res (default)
-G debug mode (extention)
-c cpp_file name of preprocessor (extention)
Example:
grc myres.rc