Windows Registry Editor Version 5.00

;RegisteredApplications
;----------------------
[HKEY_LOCAL_MACHINE\SOFTWARE\RegisteredApplications]
"MyMail"="Software\\Clients\\Mail\\MyMail\\Capabilities"


;Clients Key (The path mentioned for MyMail in RegisterdApplications key)
;------------------------------------------------------------------------
[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\MyMail]
@="MyMail"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\MyMail\Capabilities]
"ApplicationDescription"="Superfast, Light-weight Mail Client for Windows"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\MyMail\Capabilities\FileAssociations]
".eml"="MyMail.eml"
".nws"="MyMail.nws"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\MyMail\Capabilities\StartMenu]
"Mail"="MyMail"

[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\MyMail\Capabilities\UrlAssociations]
"mailto"="MyMail.mailto"


;Then create handlers for MyMail.eml, MyMail.nws, MyMail.mailto as referenced above

;EML File Type Handler
;---------------------
[HKEY_CLASSES_ROOT\MyMail.eml]
@="MyMail EML Handler"

[HKEY_CLASSES_ROOT\MyMail.eml\shell\open\command]
@="\"C:\\Program Files\\Windows Mail\\WinMail.exe\" -eml \"%1\""


;NWS File Type Handler
;---------------------
[HKEY_CLASSES_ROOT\MyMail.nws]
@="MyMail NEWS Handler"

[HKEY_CLASSES_ROOT\MyMail.nws\shell\open\command]
@="\"C:\\Program Files\\Windows Mail\\WinMail.exe\" -news \"%1\""


;MAILTO Protocol Handler
;---------------------
[HKEY_CLASSES_ROOT\MyMail.mailto]
@="MyMail MAILTO Handler"

[HKEY_CLASSES_ROOT\MyMail.mailto\shell\open\command]
@="\"C:\\Program Files\\Windows Mail\\WinMail.exe\" -mailto \"%1\""