Multithreading in Windows Forms

Question

Hello,

I am trying to figure out how multithreading works in Windows Forms in C++. With console applications, it's as simple as:

#include <thread>  
  
void f(int x)  
{  
     //do stuff  
}  
int main()  
{  
     std::thread f_thread(f, 10);  
     f_thread.detach();  
     return 0;  
}`  

However, with Windows Forms, when I try:

#include <thread>  

namespace Project  
{  
     void f(int x)  
     {  
          //do stuff  
     }  
  
//Constructor code for form  
  
private: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e)  
{  
     std::thread f_thread(f, 10);  
     f_thread.detach();  
};  
}  

I get: error C2661: 'std::thread::thread': no overloaded function takes 2 arguments

How do I invoke threads in Windows Forms?

Answer 1

In .NET Framework you can do this:

void f( Object^ p )  
{  
    int x = (int)p;  
  
}  
  
System::Void Form1_Load( System::Object^ sender, System::EventArgs^ e )  
{  
    using namespace System::Threading;  
  
    Thread^ t = gcnew Thread( gcnew ParameterizedThreadStart( this, &Form1::f ) );  
    t->Start( 10 );  
}  

Answer 2

You can use system.threading.thread
(samples in C++ at Top-Right, also at system.threading.thread.start or other)