How to create a user defined listbox control in VC++ ?

Key Words: VC++, SubClass , Control

 

Note: The VC++ project GuanRuiPaint make a big progress,  all UI related tasks have been done already !

   

CDC * pDC=CDC::FromHandle(lpDrawItemStruct->hDC);
 int nWidth= lpDrawItemStruct->itemData;
 int nStype= lpDrawItemStruct->itemData;
 if(m_nParamIndex==PEN_STYLE)
  nWidth=1;
 CPen pen;
 COLORREF crLine=RGB(255,0,0);
 int nCenterPos=(CRect(lpDrawItemStruct->rcItem).Height()-
     nWidth)/2+CRect(lpDrawItemStruct->rcItem).TopLeft().y;
 if (lpDrawItemStruct->itemAction & ODA_DRAWENTIRE) 
 {
  crLine=RGB(0,0,0);
  CBrush br(GetSysColor(COLOR_BTNFACE));
  pDC->FillRect(&lpDrawItemStruct->rcItem,&br);
 }
 if ((!(lpDrawItemStruct->itemState & ODS_SELECTED)) &&
  (lpDrawItemStruct->itemAction & (ODA_SELECT)))
 { 
  crLine=RGB(0,0,0);
  CBrush br(GetSysColor(COLOR_BTNFACE));
  //CBrush br(RGB(128,0,0));
  pDC->FillRect(&lpDrawItemStruct->rcItem,&br);
 }
 if ((!(lpDrawItemStruct->itemState & ODS_SELECTED)) &&
  (lpDrawItemStruct->itemAction & (ODA_SELECT | ODA_DRAWENTIRE)))
 { 
  crLine=RGB(255,0,0);
  CBrush br(RGB(0,0,255));
  pDC->FillRect(&lpDrawItemStruct->rcItem,&br);

  pen.CreatePen(PS_SOLID,1,crLine);
  CPen *pOldPen=pDC->SelectObject(&pen);
  pDC->MoveTo(5,nCenterPos);
  pDC->LineTo(CRect(lpDrawItemStruct->rcItem).Width()-5,nCenterPos);
  pDC->SelectObject(pOldPen)->DeleteObject();
 }