Re: Threads

PD: Testing with a UI thread I get this error:

MyThread.obj : error LNK2001: unresolved external symbol "protected:
void __thiscall MyThread::MyMessageHandler(unsigned int,long)" (?
MyMessageHandler@MyThread@@IAEXIJ@Z)
Debug/thread 2.exe : fatal error LNK1120: 1 unresolved externals

I defined a Message in MyThread.cpp:
BEGIN_MESSAGE_MAP(MyThread, CWinThread)
    //{{AFX_MSG_MAP(MyThread)
        // NOTE - the ClassWizard will add and remove mapping macros here.
        ON_THREAD_MESSAGE( WM_MYTHREAD_MESSAGE, MyMessageHandler)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

And MyMessageHandler function is this (in MyThread.cpp):
void MyMessageHandler( WPARAM wParam, LPARAM lParam )
{
    TRACE("Thread::MyMessageHandler.\n");
}

It's prototipe in MyThread.h:
// Implementation
protected:
    virtual ~MyThread();
    void MyMessageHandler( WPARAM wParam, LPARAM lParam );
    // Generated message map functions
    //{{AFX_MSG(MyThread)
        // NOTE - the ClassWizard will add and remove member functions here.
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()

I created the thread:
(MyThread*) pMyThread = (MyThread*)
AfxBeginThread( RUNTIME_CLASS( MyThread ), THREAD_PRIORITY_NORMAL, 0,
CREATE_SUSPENDED );

And started:
 pMyThread->ResumeThread();

And finally I made a button that sends a message to the thread:
void CThread2Dlg::OnButton3()
{
    // TODO: Add your control notification handler code here
    pMyThread->PostThreadMessage( WM_MYTHREAD_MESSAGE, 0, 0 );
}