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• #NEW EMAIL CLIENT FOR WINDOWS 7 KEYGEN#

#NEW EMAIL CLIENT FOR WINDOWS 7 KEYGEN#

User MUST click himself at least once to select an App on a standard Windows Open With dialog popup, if he also check the Always option, the Hash value is generated and the choice is remembered and written to last two Keys from the list above.

It's a protection against such registry edits.

Values under these Keys have the same format, a Key UserChoice with a ProgId valuename pointing to shell association Key from Classes.īut you can all but forget about editing these values, as there also is the Hash value. Which is also used only if it's not overridden by: Moreover, in case of mailto they are mandatory and so rendering the Classes values for mailto useless. There were changes in recent Windows versions and now, there are more places in registry which will further override shell associations from Classes. Registry entries for mailto protocol are under HKLM\SOFTWARE\Classes\mailto and as it is with other Classes, they could be overridden by entries for CURRENT_USER, under HKCU\SOFTWARE\Classes\mailto Quoting the relevant paragraph for your question, from papo's answer: I would most appreciate if anyone would share reliable information or documentation that explains this topic! Maybe there is a Win32 API function that returns the correct value?įor Windows 10, this seems to be different - see the discussion here: So when did this change? Has the wrong value on machine B any meaning? If not, why does it get written there in the first place? Does the mix of 64bit and 32bit email clients on the same computer change anything? When looking at the plethora of information that points to HKLM\Software\Clients\Mail, it seems obvious that previous versions of Windows handled this differently and always wrote to that location. It makes kinda sense, that Win7 now seems to hold a separate default mail client for each user, but it appears rather inconsistent. I want my application to handle this correctly for all cases. On B, both those keys contain Microsoft Outlook as the default string value, which is clearly wrong.įurther investigation revealed that the correct value seems to be written to HKCU\Software\Clients\Mail on both machines. On machine A, both HKLM\Software\Clients\Mail and HKLM\Software\Wow6432Node\Clients\Mail have an empty string as the default string value. However, the state of the registry is not as I expected it: I have two machines running Win7 64bit, let's call them A and B.Ī has Outlook 2010 64bit and Thunderbird 3 32bit installed.ī has Outlook 2007 32bit and Thunderbird 3 32bit installed.īoth A and B have Thunderbird set as their default mail client. However, this seems not to be true for all OSs and/or situations: In order to find out what the default email client is, I found the same information over and over again: Look at the default string in HKLM\Software\Clients\Mail.