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Using environmental variables to get full path-names

Posted on 2000-02-14
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Last Modified: 2010-05-02
Hi,

I'm writing code which is designed to read a server name , which is a key-value in an INI file, and then use this to connect the PC running my application to this server.

To do this, I'm using the API function "GetPrivateProfileString" which works fine when I feed it the full path-name of my INI file. Unfortunately, when I release the software the pathname could be anywhere and is defined by the environmental variable "ServNme" - can I use "ServNme" as the "File" parameter in "GetPrivateProfileString" and if so what is the sytax please? Alternativey, is there any way I can find out the definition of "ServNme" on a PC and then plug the full path-name into "GetPrivateProfileString"?

Many thanks-

  ~Rob McClure
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Question by:gizz
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4 Comments
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 2519201
You can use the Environ function to read environmental variable.

See this example from the VB help:

Environ Function Example
This example uses the Environ function to supply the entry number and length of the PATH statement from the environment-string table.

Dim EnvString, Indx, Msg, PathLen   ' Declare variables.
Indx = 1   ' Initialize index to 1.
Do
   EnvString = Environ(Indx)   ' Get environment
            ' variable.
   If Left(EnvString, 5) = "PATH=" Then   ' Check PATH entry.
      PathLen = Len(Environ("PATH"))   ' Get length.
      Msg = "PATH entry = " & Indx & " and length = " & PathLen
      Exit Do
   Else
      Indx = Indx + 1   ' Not PATH entry,
   End If   ' so increment.
Loop Until EnvString = ""
If PathLen > 0 Then
   MsgBox Msg   ' Display message.
Else
   MsgBox "No PATH environment variable exists."
End If
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Accepted Solution

by:
Erick37 earned 50 total points
ID: 2519247
Environ("ServNme") will work, but if the ini file is in the same dir as the app, you can use App.Path
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LVL 70

Expert Comment

by:Éric Moreau
ID: 2519269
Isn't it what I said!!!
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Author Comment

by:gizz
ID: 2519295
emoreau,

I'm very grateful for your speedy answer but I couldn't get it to work - when I tried it I got back the message "No PATH environment variable exists"
Using the code 'Environ("ServNme")' was exactly what I needed - once again, thanks very much for the quick answer.
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