In a VS2010 solution (not .NET), I'm looking to include the svn revision number as part of the application version.

we do not use makefiles at the moment, only the VS solution/project settings.

I'd like to get the working copy revision number at compile time, store it into a variable, so it can be used later on in the code to display the version number.

So far, I've successfully used `svnversion` to get the latest version of the working copy as a *pre-built event*.

```
"C:\Program Files\CollabNet\Subversion Client\svnversion.exe" -n $(SolutionDir)

```

At build time, I can see the correct revision number being returned into the `output` console.

Now, the question is, how can store this value into a variable that can be used within the code?

I've tried defining a pre compiler variable (`_SVNREV`) and using it to save the result from the above cmd, directly from the `pre-build` event box, but that doesn't work.

```
_SVNREV="C:\Program Files\CollabNet\Subversion Client\svnversion.exe" -n $(SolutionDir)
%_SVNREV%="C:\Program Files\CollabNet\Subversion Client\svnversion.exe" -n $(SolutionDir)
%_SVNREV="C:\Program Files\CollabNet\Subversion Client\svnversion.exe" -n $(SolutionDir)
$(_SVNREV)="C:\Program Files\CollabNet\Subversion Client\svnversion.exe" -n $(SolutionDir)

```

none of these actually work.

**RESOLUTION**:
I was heading nowhere trying to update a variable from within the VS env. so I took another route, calling a script as a pre-build step, that gets the svn revision of the working copy and then creates a header file with that info. 

Here's the `svnrev.bat` for anyone interested:

```
@echo off
set cmd="C:\"Program Files\CollabNet\Subversion Client"\svnversion.exe -n %1 "
set versionfile=%1/version.h
FOR /F %%i IN ('%cmd%') DO SET SVNVER=%%i

echo Detected program revision %SVNVER% in %1
echo #pragma once > %versionfile%
echo #define _SVNVER "%SVNVER%" >> %versionfile%

```