滚动条，在debug和release下运行结果不一样

h文件里

INT m_nVscroll_;
CBCGPScrollBar m_scroll_bar_;

 

cpp文件里：

BOOL CDlgXXX::OnInitDialog()
{
	CBCGPDialog::OnInitDialog();

	SCROLLINFO si;
	si.cbSize = sizeof(SCROLLINFO); 
	si.nMin = 0;  
	si.nMax = 100;  
	si.nPage = 5;
	si.nPos = 0;    //必须初始化，否则release下默认为16
	si.fMask = SIF_POS | SIF_RANGE | SIF_PAGE;  
	m_scroll_bar_.SetScrollInfo(&si, TRUE);

	CRect rtClient;
	GetClientRect(rtClient);	
	m_rt_vScroll_ = rtClient;
	m_rt_vScroll_.left = rtClient.right - 10;
	m_scroll_bar_.MoveWindow(&m_rt_vScroll_);    //滚动条所在的位置  
InitUI(0);

　　

void CDlgXXX::InitUI(int yScroll)
{
	const int BTN_WIDTH = 82;
	const int TITLE_WIDTH = 50;
	const int TITLE_HEIGHT = 25;
	const int SPACE = 5;
	const int LEFT_SPACE = 40 + 20;

	//分割线'
	CRect rtClient;
	GetClientRect(rtClient);

	CRect rtCtrl;
	rtCtrl.left = LEFT_SPACE - 20;
	rtCtrl.right = rtCtrl.left + 1;
	rtCtrl.top = yScroll;
	rtCtrl.bottom = rtCtrl.top + rtClient.bottom + 800;
	m_st_vline0_.MoveWindow(&rtCtrl);    //左侧线

	rtCtrl.right = rtClient.right;
	rtCtrl.left = rtCtrl.right - 1;
	rtCtrl.top = yScroll;
	rtCtrl.bottom = rtClient.bottom + yScroll + 800;
	m_st_vline1_.MoveWindow(&rtCtrl);    //右侧线

	int iPosX = LEFT_SPACE;
	int iPosY = SPACE * 3 + yScroll;    //这里注意相对位置yScroll
	m_st_title_.SetWindowPos(NULL, iPosX, iPosY, TITLE_WIDTH * 2, 30, SWP_NOZORDER);

	iPosY += 30 + SPACE;
	int iLineWidth = rtClient.Width();
	m_st_hline1_.SetWindowPos(NULL, LEFT_SPACE - 20, iPosY, iLineWidth, 1, SWP_NOZORDER);

	//墙
	iPosY += SPACE * 3;
	m_title_wall_.SetWindowPos(NULL, iPosX, iPosY, TITLE_WIDTH, TITLE_HEIGHT, SWP_NOZORDER);
	iPosY += TITLE_HEIGHT;
	m_btn_wall_.SetWindowPos(NULL, iPosX, iPosY, BTN_WIDTH, BTN_WIDTH, SWP_NOZORDER);
	iPosX += BTN_WIDTH + 3;
	m_btn_room_.SetWindowPos(NULL, iPosX, iPosY, BTN_WIDTH, BTN_WIDTH, SWP_NOZORDER);
	iPosX += BTN_WIDTH + 3;
	m_btn_region_.SetWindowPos(NULL, iPosX, iPosY, BTN_WIDTH, BTN_WIDTH, SWP_NOZORDER);
}

void CDlgXXX::OnSize(UINT nType, int cx, int cy)
{
	CBCGPDialog::OnSize(nType, cx, cy);

	if (CMainFrame::gThis != NULL && m_scroll_bar_.m_hWnd != NULL)
	{		
		BOOL b1 = CMainFrame::gThis->IsZoomed();
		if (!b1)
		{
			CRect rtClient;
			GetClientRect(rtClient);	
			m_rt_vScroll_ = rtClient;
			m_rt_vScroll_.left = rtClient.right - 10;

			m_scroll_bar_.MoveWindow(&m_rt_vScroll_);
			m_scroll_bar_.SetScrollRange(0, 250);
		}
		m_scroll_bar_.ShowWindow(FALSE);
	}

	int sy= -m_nVscroll_;
	if (m_st_vline0_.m_hWnd)
	{
		InitUI(sy);
	}
}

　　滚动条的相应：

void CDlgXXX::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
	SCROLLINFO si;  
	si.cbSize = sizeof(si);  
	m_scroll_bar_.GetScrollInfo(&si, SIF_POS | SIF_PAGE | SIF_RANGE);  
	m_nVscroll_ = si.nPos;  
	switch(nSBCode)  
	{  
	case SB_LINEDOWN:
		{
			m_nVscroll_ += 20;   
			if (m_nVscroll_ > (si.nMax - si.nMin - si.nPage ))  
			{  
				m_nVscroll_ = si.nMax - si.nMin - si.nPage;  
			}  
		}
		break;
	case SB_LINEUP:
		{
			m_nVscroll_ -= 20;  
			if (m_nVscroll_ < si.nMin)  
			{  
				m_nVscroll_ = 0;  
			}
		}
		break;  
	case SB_PAGEDOWN:
		{
			m_nVscroll_ += 8 * si.nPage;   
			if (m_nVscroll_ > (si.nMax - si.nMin - si.nPage))  
			{  
				m_nVscroll_ = si.nMax - si.nMin - si.nPage;  

			}
		}
		break;  
	case SB_PAGEUP:  
		{
			m_nVscroll_ -= 8 * si.nPage;  
			if (m_nVscroll_ < si.nMin)  
			{  
				m_nVscroll_ = 0;  
			} 
		}
		break;  
	case SB_THUMBTRACK:
		{
			m_nVscroll_ = nPos; 
		}
		break;
	}  

	if (si.nPos != m_nVscroll_)
	{
		ScrollWindow(0, -(m_nVscroll_ - si.nPos), NULL ,NULL);
	}

	si.nPos = m_nVscroll_;  
	m_scroll_bar_.SetScrollInfo(&si, TRUE);  

	CBCGPDialog::OnVScroll(nSBCode, nPos, pScrollBar);
}

BOOL CDlgXXX::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
{
	//向下滚  
	if (zDelta == -120)
	{
		m_nVscroll_ += 10;  
		OnVScroll(SB_PAGEDOWN, m_nVscroll_, &m_scroll_bar_);  
	}  
	else if (zDelta == 120)  
	{  
		m_nVscroll_ -= 10;
		OnVScroll(SB_PAGEUP, m_nVscroll_, &m_scroll_bar_);
	}

	return CBCGPDialog::OnMouseWheel(nFlags, zDelta, pt);
}