source1.cpp

// <snippet1>
using namespace System;
using namespace System::Threading;

public ref class Example
{
public:
    static void Main()
    {
        // Queue the task.
        ThreadPool::QueueUserWorkItem(gcnew WaitCallback(&ThreadProc));

        Console::WriteLine("Main thread does some work, then sleeps.");
        // If you comment out the Sleep, the main thread exits before
        // the thread pool task runs.  The thread pool uses background
        // threads, which do not keep the application running.  (This
        // is a simple example of a race condition.)
        Thread::Sleep(1000);

        Console::WriteLine("Main thread exits.");
    }

    // This thread procedure performs the task.
    static void ThreadProc(Object^ stateInfo)
    {
        // No state object was passed to QueueUserWorkItem, so
        // stateInfo is null.
        Console::WriteLine("Hello from the thread pool.");
    }
};

int main()
{
    Example::Main();
}
// </snippet1>