Office 2007 Key Sale Windows file association for

Windows double-click the file once the program if the file associated with the extension , it is going to make use of the associated program to open the file. How it's implemented within it? Today I give you a brief talk about .

every thing within the registry

all registered extension in Windows registry , it 's crucial in :

HKEY_CLASSES_ROOT
the following figure ,Office 2007 Key Sale, it is possible to see you can find numerous registry keys :



search . txt keys :



fairly peculiar that there's no crucial was found through which what plan to open it.

solution lies . txt default value , consider a appear . txt default values ​​:



. txt default worth is :

txtfile

that the txtfile What exactly is it? In fact,Buy Office Standard 2007, txtfile is also a key beneath HKEY_CLASSES_ROOT in its path is :

HKEY_CLASSES_ROOT txtfile

facie txtfile What exactly is it :


fancy maps,Office Home And Business Key, we noticed no , there's a shell open command from the sub- entry , after which open the item to find out :



see No ,Buy Windows 7 Professional, notepad.exe is

I found right here to guess , this will be the default open program.

proven

the previously mentioned is conjecture ,Office 2010 Professional Plus Key, but additionally should validate it.

I created a . test extension to this sort registered as testfile.



testfile Add a new entry :



check :



Summary



very first , Windows seems to be inside the registry corresponding to the extension with out registration, you will find as much as read the corresponding file type extension , locate the file type after which read from Take the associated system , which calls the system to open.