winforms - c++ - invoke method

Question

i'm trying to implement an invoke method for updateing an textbox from another thread.

to do so, i followed some instructions/tutorials on the internet, but without success:

this is where my main form initialize ,called MyForm.cpp:

Calc::MyForm::MyForm(){

InitializeComponent();

System::Threading::Thread ^plsInvoke = gcnew Thread(this, &Calc::initatePls);
//Thread = thread
plsInvoke->Start();
}

the function I want to thread is located in pls.cpp, and called initatePls.

void Calc::initatePls()

{
hCommPLS = connectCom(6, 115200);   
sendPls();
}

the error i'm reciving:

Severity Code Description Project File Line Suppression State Error C2664 'System::Threading::Thread::Thread(const System::Threading::Thread %)': cannot convert argument 1 from 'void (__cdecl )(void)' to 'System::Threading::ThreadStart ^' Calc C:\Users\david\OneDrive******\Calc\MyForm.cpp 111

the goal, as I said, update the textbox with global variable located in pls.cpp.

thanks.

Answer 1

Make sure to include namespace System and namespace System::Threading, or to write the whole namespace each time System::Threading::Thread.

You can also create a gcnew ThreadStart in your gcnew Thread to immediatly start the Thread so you can remove threadName->Start();

Example:

using namespace System;
using namespace System::Threading;

void exampleFunction() {
    Thread^ thread1 = gcnew Thread(gcnew ThreadStart(this, &Calc::initatePls));
}