多线程进度条的显示问题

void CClrGradientPrgssCtrlDlg::OnTest() 

{

	UpdateData(TRUE);



	//设置参数

	m_cProgress.SetRange(0, m_nRange);

	m_cProgress.ShowPercent(m_bShowPercent);



	m_cProgress.SetStartColor(m_clrStart);

	m_cProgress.SetEndColor(m_clrEnd);

	m_cProgress.SetTextColor(m_clrText);

	m_cProgress.SetBkColor(m_clrBk);

	



	for (int i=0; i <= m_nRange; i++)

	{

		PeekAndPump();

		m_cProgress.SetPos(i);

	}	

}





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

void CClrGradientPrgssCtrlDlg::OnPaint() 

{

	if (IsIconic())

	{

		CPaintDC dc(this); // device context for painting



		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);



		// Center icon in client rectangle

		int cxIcon = GetSystemMetrics(SM_CXICON);

		int cyIcon = GetSystemMetrics(SM_CYICON);

		CRect rect;

		GetClientRect(&rect);

		int x = (rect.Width() - cxIcon + 1) / 2;

		int y = (rect.Height() - cyIcon + 1) / 2;



		// Draw the icon

		dc.DrawIcon(x, y, m_hIcon);

	}

	else

	{

		CDialog::OnPaint();

	}

}