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Path environment variables and the registry


Hi,

This may be slightly OT, but as I'm using VB.NET I'll ask anyway...

I'm trying to update my path using the following code to tweak the registry
Dim regKey As RegistryKey
regKey = Registry.Curren tUser.OpenSubKe y("Environment" , True)
Dim s As String = CType(regKey.Ge tValue("Path"), String)
s = s & ";" & TextBox1.Text
regKey.SetValue ("Path", s)
regKey.Close()

Which seems to work, in that the registry is updated correctly (checked
with regedit) and my user path seems to have been updated (checked with
right click on my computer, advanced, environment variables...)

My problem is that the actual path doesn't seem to have been updated in
practice (checked by typing 'path' on command line - new folder not
added, and using Environment.Get Variables("path ") from within my
application).

Why does this discrepancy occur, and how do I fix it?

Many thanks,

Gary
Nov 21 '05 #1
2 3045
Have a look at the article I mentioned in my previous reply:
http://support.microsoft.com/kb/q104011/

" However, note that modifications to the environment variables do not
result in immediate change. For example, if you start another Command Prompt
after making the changes, the environment variables will reflect the
previous (not the current) values. The changes do not take effect until you
log off and then log back on.

To effect these changes without having to log off, broadcast a
WM_SETTINGCHANG E message to all windows in the system, so that any
interested applications (such as Windows Explorer, Program Manager, Task
Manager, Control Panel, and so forth) can perform an update. "
Nov 21 '05 #2
kHSw wrote:
Have a look at the article I mentioned in my previous reply:
http://support.microsoft.com/kb/q104011/

" However, note that modifications to the environment variables do not
result in immediate change. For example, if you start another Command Prompt
after making the changes, the environment variables will reflect the
previous (not the current) values. The changes do not take effect until you
log off and then log back on.

To effect these changes without having to log off, broadcast a
WM_SETTINGCHANG E message to all windows in the system, so that any
interested applications (such as Windows Explorer, Program Manager, Task
Manager, Control Panel, and so forth) can perform an update. "


Aah, it all becomes clear! Thanks for that.
Nov 21 '05 #3

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