CxImage Demo 改成单文档后文档里的线程投递消息，视类无反应

CxImage Demo 改为单文档后文档里的线程投递消息，视类无反应

只修改了一个函数做测试OnCximageRotatel---向左旋转，
现在贴主要代码如下：

void CXDoc::OnCximageRotatel()

{

	// TODO: Add your command handler code here

	m_MenuCommand=ID_CXIMAGE_ROTATEL;

	m_hThread=(HANDLE)_beginthread(RunCxImageThread,0,this);

}

void /*unsigned long _stdcall*/ RunCxImageThread(void *lpParam)

{

	CXDoc *pDoc = (CXDoc *)lpParam;

	if (pDoc==NULL) return;

	if (pDoc->m_mainImage==NULL){

		pDoc->m_hThread=0;

		return;

	}


	//prepare for elaboration

	pDoc->m_mainImage->SetProgress(0);

	pDoc->m_mainImage->SetEscape(0);


	//pDoc->SubmitUndo();


	// auxilary thread for progress bar

	pDoc->m_hProgress = (HANDLE)_beginthread(RunProgressThread,0,pDoc);


	pDoc->Stopwatch(0);


	bool status = true;


	switch (pDoc->m_MenuCommand)

	{

	case ID_CXIMAGE_ROTATEL:

		status = pDoc->m_mainImage->RotateLeft();

		if (status) pDoc->RegionRotateLeft();

		break;

	}

	pDoc->Stopwatch(1);


	pDoc->m_mainImage->SetProgress(100);


	if (!status){

		CString s = pDoc->m_mainImage->GetLastError();

		AfxMessageBox(s);

	}


	pDoc->m_hThread=0;


	_endthread();


}

//////////////////////////////////////////////////////////////////////////////

void /*unsigned long _stdcall*/ RunProgressThread(void *lpParam)

{

	CXDoc *pDoc = (CXDoc *)lpParam;

	POSITION pos;

	CView *pView;

	while(pDoc->m_hThread){

		Sleep(333);

		if(!pDoc->m_mainImage) break;

		if(pDoc->m_mainImage->GetEscape()) break;

		long n=pDoc->m_mainImage->GetProgress();

		pos = pDoc->GetFirstViewPosition();

		pView = pDoc->GetNextView(pos);

		if (pView) SendMessage(pView->m_hWnd, WM_USER_PROGRESS,n,0);

	}

	pos = pDoc->GetFirstViewPosition();

	pView = pDoc->GetNextView(pos);

	if (pView) 

	    SendMessage(pView->m_hWnd, WM_USER_PROGRESS,100,0);

	Sleep(111);

	pos = pDoc->GetFirstViewPosition();

	pView = pDoc->GetNextView(pos);

	if (pView)

	{

	SendMessage(pView->m_hWnd, WM_USER_NEWIMAGE,0,0);

	}

	pDoc->m_hProgress = 0;


	_endthread();

	return;

}

看CxImage 自带的Demo  SendMessage(pView->m_hWnd, WM_USER_NEWIMAGE,0,0);发出后，视类的onUpdate()马上收到消息，但改了以后执行完线程后，断点进入不了视类的onUpdate(),也就不能更新视类，请求帮忙