Windows, may not require an ending quote mark, only an opening, in many cases.
So you can do something like,
DIR "c:\my documentsDIR "c:\my documents"DIR "c:\my*DIR "c:\my do*DIR "c:\my documentsDoesn't work everywhere, & what a particular program requires may vary.
And kind of obvious, but for this to be of benefit, the directory (or file name) [with spaces] would need to be the final command line argument.