Reference a nonstatic MFC class member in a static thread function

Declare a thread function:

static DWORD WINAPI ThreadFunc(LPVOID lpParameter);

Pass a this pointer to thread function:

HANDLE hThread = CreateThread(NULL, 0, ThreadFunc, this, 0, NULL);

In the thread function definition:

DWORD WINAPI CMFCDemoDlg::ThreadFunc(LPVOID lpParameter)
{
    //convert lpParameter to class pointer type
    CMFCDemoDlg* pMfcDemo = (CMFCDemoDlg*)lpParameter;

    // Now you can reference the CMFCDemoDlg class members
    ......
}