batch not displaying full filename

batch not displaying full filename

I am currently playing with batch and associations. Why is it that %0 to
get full path of the batch file and %1 won't fully display a filename (if
more than 1 word spaced) properly.
-reg file entered into registry-
[HKEY_CLASSES_ROOT\*\shell\show me path\command]
@="\"C:\\blah\\blah\\sample batch.bat\"%1"
-sample batch.bat-
@echo off
echo %0
echo %1
pause
Results from right click command "show me path" of file "try this.mp4"
"c:\blah\blah\sample batch.bat"
c:\try
press any key to continue . . .
As you can see I get "try" how to get it to display full path/file name
Any help would be greatly appreciated.