Writes a resource value to the specified resource database. If file is #f, the platform-specific resource database is read, as determined by find-graphical-system-path with 'setup-file.
The resource value is keyed on the combination of section and entry. The "mred" section is reserved for PLT.
The return value is #t if the write suceeds, #f otherwise. (A failure indicates that the resource file cannot be written.)
If value is an integer outside a platform-specific range, an exn:application:mismatch exception is raised.
See also get-resource.