Multithreading with Classes in MFC

Hello,

I am having trouble implementing multi-threading into my program.
At the moment, I am reading the MSDN libraries but it does not make much sense to me.

To start off, I have two different classes that will output to two different files.

For example, a simple example class is given below.

At the moment, I have them outputting one after the other. Although performance isn't really an issue at the moment, I will be eventually be dealing large amounts of data and would like the classes to be doing calculations and output independently on different threads.

I intended to use a Worker Thread but I am unsure how what parameters to pass through to the AfxBeginThread() function.

If anyone could provide any assistance, will be greatly appreciated!

Thank you in advance!

void CLASSA::output()
{
	ofstream output( output1.txt );

	for( unsigned int x = 0; x < 100; x++ )
	{
		output << x << "\n";
	}

	output.close();
}

void CLASSB::output()
{
	ofstream output( output2.txt );

	for( unsigned int x = 0; x < 100; x++ )
	{
		output << x << "\n";
	}

	output.close();
}