quotes inside quotes with windows' cmd

Question

I have the following command set as a custom URL protocol in windows registry:

cmd /V:ON /C "SET r=%1 & SET s=!r:jhvnc:=! & start C:\Program Files\uvnc bvba\UltraVNC\vncviewer.exe !s:_= !"

This is not working because the path to the exe file has a space.

Normally, I'd use quotes:

cmd /V:ON /C "SET r=%1 & SET s=!r:jhvnc:=! & start "C:\Program Files\uvnc bvba\UltraVNC\vncviewer.exe" !s:_= !"

but the command is already in quotes. I tried escaping the quotes with double quotes, but that did not work.

How can I achieve this?

Answer 1

Simplest work around is use the historic short folder name

That should be C:\\PROGRA~1\\UVNCBV~1\\

check using dir /x /a:d C:\\PROGRA~1\\U*

cmd /V:ON /C "SET r=%1 & SET s=!r:jhvnc:=! & start C:\PROGRA~1\UVNCBV~1\UltraVNC\vncviewer.exe !s:_= !"