2 vie:
A
HKEY_CLASSES_ROOT\eml_auto_file\shell\read\command to call“c:\Program Files\Microsoft Office\Office12\outlook.exe” /eml “%1”
Next I created the keys HKEY_CLASSES_ROOT\Applications\OUTLOOK_eml.exe\shell\open\command
In the command key set (default) REG_SZ value to “c:\Program Files\Microsoft Office\Office12\outlook.exe” /eml “%1”
openHKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.eml\UserChoice
Change Progid to Applications\OUTLOOK_eml.exe
B
1) Open up regedit.exe (The windows registry editor)
2) Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Microsoft Internet Mail Message WLMail\shell\open\command
3) Change “C:\Program Files (x86)\Windows Live\Mail\wlmail.exe” /eml:%1 to “C:\Program Files (x86)\Microsoft Office\Office12\OUTLOOK.EXE” /eml “%1” (do not forget the double quotes!)
4) Restart your computer
