对话框自带滚动条的使用

 出处：http://wenku.baidu.com/view/549d4f6727d3240c8447efee.html

一，使用对话框窗口自带的滚动条，在属性页面中设置即可，如下

二，OnInitDialog()函数中，添加如下滚动条初始化语句

       SCROLLINFO vinfo;

       vinfo.cbSize =sizeof(vinfo);

       vinfo.fMask =SIF_ALL;

       vinfo.nPage =50;//滚动块自身的长短，通常有如下关系：其长度/滚动条长度（含两个箭头）=nPage/(nMax+2)，

                  //另外nPage取值-1时，滚动条会不见了。

       vinfo.nMax =600;//滚动条所能滚动的最大值

       vinfo.nMin=0;//滚动条所能滚动的最小值

       vinfo.nTrackPos =0;

       SetScrollInfo(SB_VERT,&vinfo);//即使上述步骤一不做，使用此条语句也可以显示滚动条

三，添加相应的WM_VSCROLL函数

void CMy1d0Dlg::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)

{

       // TODO: Add your message handler code here and/or call default

       SCROLLINFO scrollinfo;

       GetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);

switch (nSBCode)

{

case SB_BOTTOM: //滑块滚动到最底部

ScrollWindow(0,(scrollinfo.nPos-scrollinfo.nMax)*10); //滚动屏幕

scrollinfo.nPos = scrollinfo.nMax; //设定滑块新位置

SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL); //更新滑块位置

break;

case SB_TOP: //滑块滚动到最顶部

ScrollWindow(0,(scrollinfo.nPos-scrollinfo.nMin)*10);

scrollinfo.nPos = scrollinfo.nMin;

SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);

break;

case SB_LINEUP: //单击上箭头

scrollinfo.nPos -= 1;

if (scrollinfo.nPos<scrollinfo.nMin)

{

scrollinfo.nPos = scrollinfo.nMin;

break;

}

SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);

ScrollWindow(0,10);

break;

case SB_LINEDOWN: //单击下箭头

scrollinfo.nPos += 1;

if (scrollinfo.nPos>scrollinfo.nMax)

{

scrollinfo.nPos = scrollinfo.nMax;

break;

}

SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);

ScrollWindow(0,-10);

break;

case SB_PAGEUP: //单击滑块上方空白区域

scrollinfo.nPos -= 5;

if (scrollinfo.nPos<scrollinfo.nMin)

{

scrollinfo.nPos = scrollinfo.nMin;

break;

}

SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);

ScrollWindow(0,10*5);

break;

case SB_PAGEDOWN: //单击滑块下方空白区域

scrollinfo.nPos += 5;

if (scrollinfo.nPos>scrollinfo.nMax)

{

scrollinfo.nPos = scrollinfo.nMax;

break;

}

SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);

ScrollWindow(0,-10*5);

break;

case SB_ENDSCROLL: //鼠标离开滑块，结束滑块拖动

// MessageBox("SB_ENDSCROLL");

break;

case SB_THUMBPOSITION:

// ScrollWindow(0,(scrollinfo.nPos-nPos)*10);

// scrollinfo.nPos = nPos;

// SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);

break;

case SB_THUMBTRACK: //拖动滑块

ScrollWindow(0,(scrollinfo.nPos-nPos)*10);

scrollinfo.nPos = nPos;

SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);

break;

}

  CDialog::OnVScroll(nSBCode, nPos, pScrollBar);

}