C＃dll导入和环境变量

Question

This is a tough one to explain, but I will do my best. I writing a C# program and am using DLLImport to access Unmanaged Code in an external C++ DLL. The C++ DLL is a wrapper to a java program. I can only get it to work if I call my C# program is called within a DOS batch file that sets various Environment Variables that are required by the C++/Java external functions. I want to be able to not use a DOS batch file and set and control the Environment Variables withing my C# program. Seeking tips form anyone as I have not found a way to do this, or know if it even possible. Thanks.

Answer 1

What's about

public static void SetEnvironmentVariable(
    string variable,
    string value,
     EnvironmentVariableTarget targer
)

This function sets Enviroment variable

using System
....
Environment.SetEnvironmentVariable(envName, envValue,EnvironmentVariableTarget.Machine);

Look example at msdn http://msdn.microsoft.com/en-us/library/z46c489x%28v=vs.110%29.aspx?cs-save-lang=1&cs-lang=csharp#code-snippet-1