How to: Determine the User Interactive State (C++/CLI)
The following code example demonstrates how to determine whether code is being run in a user-interactive context. If UserInteractive is false, then the code is running as a service process or from inside a Web application, in which case you should not attempt to interact with the user.
Example
// user_interactive.cpp
// compile with: /clr
using namespace System;
int main()
{
if ( Environment::UserInteractive )
Console::WriteLine("User interactive");
else
Console::WriteLine("Noninteractive");
return 0;
}