CS-Script 3.9.7

CS-Script on Vista/Win7

CS-Script can work on any OS as long as it has .NET installed. This is the nature of the managed code execution under CLR. The .NET assemblies (C# script exists in a form of assembly during the execution) are generally neutral with respect to the OS they are running on. This is why all versions of CS-Script can virtually run on any OS. However in case of Vista/Win7 the default CS-Script functionality is not sufficient to support x64 and UAC execution scenarios.

Version 2.0 and all subsequent versions of CS-Script are able to handle such scenarios.

x64 specific scenarios

Under x64 CLR all loaded assemblies (including scripts being executed) belong to the x64 execution context. It means that such script can not access/load x32 resources directly. Here is an example that illustrates this:

internal static extern IntPtr new_aspell_config();


IntPtr config = new_aspell_config();

The code above will produce "An attempt was made to load a program with an incorrect format." error if executed on x64 OS. The reason for this error is that aspell-15.dll is a x32 binary and x64 CLR just can not load it. Note this problem is common for any managed code execution not only for C# scripts.

Usually .NET assembly is indifferent with respect to the CPU type. It always accepts the CPU type of the operating system. This is the reason why the code above will always fail on WinXP-64 and will always work on WinXP-32. So what can you do to overcome the problem? Well, it is not possible to execute the above script on Vista/Win7, however it is possible to compile it into an executable for the specific CPU type (x32) and run that executable instead of running the script. Thus, if the script name is aspell.cs you can compile it into the x32 executable in the following way:

 cscs /e /co:/platform:x86 aspell.cs

UAC scenarios

An important part of UAC is Process Elevation. Any process, which requires assessing the privileged resources (e.g. LM registry) has to be started within the Administrator account  context. Note: even if the current user belongs to the Administrators user group, process elevation still needs to occur. Another important thing is that a given process cannot elevate itself. It can only restart itself with elevated rights requested. And this is exactly what CS-Script does when the script execution requires process elevation. You can do it in the one of the following ways:

Interestingly enough, the CS-Script process elevation mechanism works on WindowsXP too, thus it can be used to force the script execution with administrative privileges the same way as on Vista/Win7.

Another important thing about UAC and CS-Script is that changing the script engine configuration settings now requires process elevation. Of course you can start the configuration console (config.cs script) in elevated  mode by any of the techniques described above, however it may be quite inconvenient if you change the settings often. To simplify access to the configuration console a special console launcher (css_config.exe) has been created. After executing the launcher you have an option to start the configuration console with elevation (full-access mode) or without one (restricted mode).

See Also

Script AliasesScript Library