Here is a working example:
/Applications/VMware\ Fusion.app/Contents/Library/vmrun -T fusion -gu <user\ name> -gp <password> runProgramInGuest /Users/<hostUserName>/Library/Application\ Support/VMware\ Fusion/Virtual\ Machines/Boot\ Camp/Boot\ Camp.vmwarevm/Boot\ Camp.vmx -interactive -noWait -activeWindow C:\\Windows\\Notepad.exe C:\\testing.txt