The resource file that you want to add to your output file.
Remarks
A Win32 resource file can be created with the Resource Compiler.
A Win32 resource can contain version or bitmap (icon) information that would help identify your application in the Windows Explorer. If you do not specify /win32res, the compiler will generate version information based on the assembly version.
See /linkresource (to reference) or /resource (to attach) a .NET Framework resource file.
Example
Compile in.js and attach a Win32 resource file rf.res to produce in.exe: