使用滚动条进行窗口滚动的一个例子（Windows Mobile MFC）

本文只适合窗口背景与前景一同滚动的情况，不适合背景固定不动的情况。

首先为窗口添加风格WS_VSCROLL（垂直滚动条）。

然后处理OnSize：

void CUserRegisterDlg::OnSize(UINT nType, int cx, int cy)
{
	CDialogBase::OnSize(nType, cx, cy);

	// TODO: Add your message handler code here
	OnVScroll(SB_TOP,0,NULL); 
	SetScrollRange(SB_VERT, 0, THEME->GetScreenPortraitSize().cy/*屏高*/ - TORP(52)/*标题栏菜单栏*/ - cy);
}

处理OnVScroll：

#define SW_STYLE  SW_SCROLLCHILDREN|SW_INVALIDATE|SW_ERASE

void CUserRegisterDlg::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
	// TODO: Add your message handler code here and/or call default
	SCROLLINFO scrollinfo;
	GetScrollInfo(SB_VERT,&scrollinfo);  
	int& nPosFrom = scrollinfo.nPos;
	int nPosTo = nPos;

	switch (nSBCode)  
	{  
	case SB_BOTTOM:  
		nPosTo = scrollinfo.nMax;
		goto label;

	case SB_TOP:  
		nPosTo = scrollinfo.nMin;
		goto label;

	case SB_LINEUP:  
		nPosTo = scrollinfo.nPos - TORP(5);
		if (scrollinfo.nPos == scrollinfo.nMin)
			break;
		else if (nPosTo < scrollinfo.nMin)
			nPosTo = scrollinfo.nMin;
		goto label;

	case SB_LINEDOWN:
		nPosTo = scrollinfo.nPos + TORP(5);
		if (scrollinfo.nPos == scrollinfo.nMax)
			break;
		else if (nPosTo > scrollinfo.nMax)
			nPosTo = scrollinfo.nMax;
		goto label;

	case SB_PAGEUP:  
		nPosTo = scrollinfo.nPos - TORP(130);
		if (scrollinfo.nPos == scrollinfo.nMin)
			break;
		else if (nPosTo < scrollinfo.nMin)
			nPosTo = scrollinfo.nMin;
		goto label;

	case SB_PAGEDOWN:  
		nPosTo = scrollinfo.nPos + TORP(130);
		if (scrollinfo.nPos == scrollinfo.nMax)
			break;
		else if (nPosTo > scrollinfo.nMax)
			nPosTo = scrollinfo.nMax;
		goto label;

	case SB_THUMBPOSITION:  
		if(scrollinfo.nPos==scrollinfo.nMax && (nPos>scrollinfo.nMax) )
			break;
		goto label;

	case SB_THUMBTRACK:  
		if(scrollinfo.nPos==scrollinfo.nMax && (nPos>scrollinfo.nMax) )
			break;
		goto label;

label:
		SetScrollPos(SB_VERT, nPosTo);
		ScrollWindowEx(0, nPosFrom - nPosTo, NULL, NULL, NULL, NULL, SW_STYLE);
		UpdateWindow();
		break;  

	case SB_ENDSCROLL:  
		break;  
	}

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

运行时发现，在对话框刚打开时输入法为打开状态的情况下，窗口rect并没有根据输入法位置而自动调整，所以滚动条也就没出现。可以用下面代码解决：

#include <Sipapi.h>

BOOL CUserRegisterDlg::OnInitDialog()
{
	CDialogBase::OnInitDialog();

	// TODO: Add extra initialization here
	SIPINFO si  =  {0};    
	si.cbSize   =  sizeof(si); 
	SHSipInfo(SPI_GETSIPINFO, 0, &si, 0); 
	BOOL bShow = si.fdwFlags&SIPF_ON;
	if (bShow)
	{
		MoveWindow(&si.rcVisibleDesktop);
	}

	return FALSE;	// return TRUE unless you set the focus to a control
	// EXCEPTION: OCX Property Pages should return FALSE
}