Accessing %systemroot% value in code

[jeffc]

I can execute the following code, and it correctly decodes the system folder
string.
FileVersionInfo versionInfo =
FileVersionInfo.GetVersionInfo("%systemroot%\\syst em32\\xyz.dll");

But what I want to do is determine what the value is, so I can use it in my
own string, such as this:
String fileString = "%systemroot%\\system32\\xyz.dll";

Anyone know how to get the value of that filled in there? thx

[Hakan Fatih YILDIRIM]

determining what the value is? which value do you want to know?

[jeffc]

"Hakan Fatih YILDIRIM" <hf*********@gmail.comwrote in message
news:11*********************@w3g2000hsg.googlegrou ps.com...

determining what the value is? which value do you want to know?

The value of systemroot, of course.

[Nicholas Paldino [.NET/C# MVP]]

I believe that you want to call the PathUnExpandEnvStrings API function
through the P/Invoke layer. This is located in shlwapi.dll.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"jeffc" <no****@nospam.comwrote in message
news:O1**************@TK2MSFTNGP02.phx.gbl...

>
"Hakan Fatih YILDIRIM" <hf*********@gmail.comwrote in message
news:11*********************@w3g2000hsg.googlegrou ps.com...

>determining what the value is? which value do you want to know?

The value of systemroot, of course.

[jeffc]

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.comwrote in
message news:Om**************@TK2MSFTNGP04.phx.gbl...

I believe that you want to call the PathUnExpandEnvStrings API function
through the P/Invoke layer. This is located in shlwapi.dll.

While not %systemroot% exactly, but I was able to find
System.Environment.SystemDirectory. This might be "C:\Windows\system32",
for example.

[Nicholas Paldino [.NET/C# MVP]]

Jeff,

The call to the SystemDirectory property will make a call to the
GetSystemDirectory API function underneath the covers. This is fine if you
just want to get the system directory and nothing else. If you want to
translate strings that have the values in it for the systemroot and other
directories, it's better to call the function I mentioned before and have
the OS do it for you.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"jeffc" <no****@nospam.comwrote in message
news:OK****************@TK2MSFTNGP04.phx.gbl...

>
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.comwrote
in message news:Om**************@TK2MSFTNGP04.phx.gbl...

> I believe that you want to call the PathUnExpandEnvStrings API
function through the P/Invoke layer. This is located in shlwapi.dll.

While not %systemroot% exactly, but I was able to find
System.Environment.SystemDirectory. This might be "C:\Windows\system32",
for example.

[Ben Voigt [C++ MVP]]

"jeffc" <no****@nospam.comwrote in message
news:eL**************@TK2MSFTNGP02.phx.gbl...

>I can execute the following code, and it correctly decodes the system
folder string.
FileVersionInfo versionInfo =
FileVersionInfo.GetVersionInfo("%systemroot%\\syst em32\\xyz.dll");

But what I want to do is determine what the value is, so I can use it in
my own string, such as this:
String fileString = "%systemroot%\\system32\\xyz.dll";

Anyone know how to get the value of that filled in there? thx

In native code, ExpandEnvironmentStrings in kernel32.dll

In .NET, System.Environment.ExpandEnvironmentVariables

[=?Utf-8?B?U2VyZ2V5IFBvYmVyZXpvdnNraXk=?=]

you can use
System.Environment.SystemDirectory

"jeffc" wrote:

I can execute the following code, and it correctly decodes the system folder
string.
FileVersionInfo versionInfo =
FileVersionInfo.GetVersionInfo("%systemroot%\\syst em32\\xyz.dll");

But what I want to do is determine what the value is, so I can use it in my
own string, such as this:
String fileString = "%systemroot%\\system32\\xyz.dll";

Anyone know how to get the value of that filled in there? thx

[jeffc]

"jeffc" <no****@nospam.comwrote in message
news:eL**************@TK2MSFTNGP02.phx.gbl...

>I can execute the following code, and it correctly decodes the system
folder string.
FileVersionInfo versionInfo =
FileVersionInfo.GetVersionInfo("%systemroot%\\syst em32\\xyz.dll");

But what I want to do is determine what the value is, so I can use it in
my own string, such as this:
String fileString = "%systemroot%\\system32\\xyz.dll";

Anyone know how to get the value of that filled in there? thx

>>In .NET, System.Environment.ExpandEnvironmentVariables

This was actually the right answer to my question.

>>System.Environment.SystemDirectory

As it turns out, this was value that I actually wanted! Thanks all.