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c# - How do I create a "custom protocol" and map it to an application?

How would one go about creating a "custom protocol?" I know you can create a URL protocol by adding a number of registry entries to HKEY_CLASSES_ROOT, but that seems to only work in a browser. I need for it to work in Windows Explorer also.

I know that I can write a client/server sort of interface, but I think that is overkill for my client's needs (and budget).

Long story short...

  • A third-party application should call: tbwx:<row_id>
  • My app should load and delete a record from the database.

It sounds fairly simple (or so I thought). Any ideas?

Thanks

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At least on Windows 7, you can create a custom protocol as long as you add a URL Protocol value of type REG_SZ to the key. It doesn't need an actual value, just needs to be present. Here's a simple example of an "Echo Protocol" I just created which works in explorer.

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOTecho]
"URL Protocol"=""
@="Echo Protocol"

[HKEY_CLASSES_ROOTechoshell]

[HKEY_CLASSES_ROOTechoshellopen]

[HKEY_CLASSES_ROOTechoshellopencommand]
@="C:\WINDOWS\SYSTEM32\CMD.EXE /Q /C (echo %1) && pause"

I've found it will also work in the keys HKCUSoftwareClasses and HKLMSoftwareClasses too. It isn't listed in the Control PanelProgramsDefault ProgramsSet Associations list however. Other keys might need to be updated or it would have to be registered with Windows somehow.

I imagine it is the same or similar in older versions of Windows XP and up.


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