Custom URL for toast notification buttons in registry - powershell

Question

I trying to run a command that opens up Software Center on my machine. It works just fine if I run it in Command Prompt but not when I call it from my custom protocol handler in the registry. The main problem is that when called from the protocol handler, via a Toast button, Windows tells me I need a new app to open this.
Here is the command.
"C:\WINDOWS\CCM\ClientUX\SCClient.exe" softwarecenter:Page=Applications FilterType=0 SortType=6 View=Upcoming
Here is how I am setting up the protocol handler in registry
New-item 'HKLM:\SOFTWARE\ToastSoftwareCenter' -force
Set-itemproperty 'HKLM:\SOFTWARE\ToastSoftwareCenter' -name '(DEFAULT)' -value 'url:ToastSoftwareCenter' -force
Set-itemproperty 'HKLM:\SOFTWARE\ToastSoftwareCenter' -name 'URL Protocol' -value '' -force
New-itemproperty -path 'HKLM:\SOFTWARE\ToastSoftwareCenter' -propertytype dword -name 'EditFlags' -value 2162688
New-item 'HKLM:\SOFTWARE\ToastSoftwareCenter\Shell\Open\command' -force
Set-itemproperty 'HKLM:\SOFTWARE\ToastSoftwareCenter\Shell\Open\command' -name '(DEFAULT)' -value '"C:\WINDOWS\CCM\ClientUX\SCClient.exe" softwarecenter:Page=InstallationStatus FilterType=0 SortType=6 View=Upcoming' -force
I have tried appending these other commands on the end of the command to associate it as an exe so it wont ask anymore, but to no avail.
ftype exefile="%1" %*
assoc .exe=exefile\
The commands work when running them from a command prompt but not from the protocol handler. Am I setting it up wrong?
Thank You.

Answer 1

You're creating the protocol in the wrong location. It needs to be created under HKEY_CLASSES_ROOT
You also need to create the PSDrive in order to easily access that location within PowerShell.
New-PSDrive -PSProvider Registry -Root HKEY_CLASSES_ROOT -Name HKCR
New-Item 'HKCR:\ToastSoftwareCenter' -Force
Registering the Application Handling the Custom URI Scheme