三.聊天常用  

a.LINK 链接功能

1.  LoadLibrary(_T("Riched20.dll"));

2. 创建RichEdit2.0控件

CreateEx(0, _T("RichEdit20A"), NULL, WS_CHILD|WS_VISIBLE|WS_VSCROLL|WS_TABSTOP
         |ES_READONLY|ES_WANTRETURN|ES_MULTILINE,
         rect.left, rect.top, cx, cy,
         pParentWnd->m_hWnd, (HMENU)nID, NULL);

3. 设定选中的文字为链接显示

CHARFORMAT2 cf2;
ZeroMemory(&cf2, sizeof(CHARFORMAT2));//
cf2.cbSize = sizeof(CHARFORMAT2);
cf2.dwMask = CFM_LINK;
cf2.dwEffects |= CFE_LINK;
m_cRichEdit.SendMessage(EM_SETCHARFORMAT, SCF_SELECTION, (LPARAM)&cf2);

4.支持链接的点击响应

m_cRichEdit.SetEventMask(ENM_LINK);

5.响应链接的点击EN_LINK BEGIN_MESSAGE_MAP(CMyRichEdit, CRichEditCtrl)

ON_NOTIFY_REFLECT(EN_LINK,OnURL)
END_MESSAGE_MAP()
...... 
void CMyRichEdit::OnURLClick(NMHDR *pNmhdr, LRESULT *pResult)
{
    TCHAR LinkChar[512];
    ENLINK *pLink = (ENLINK *)pNmhdr;
    if (pLink->msg == WM_LBUTTONUP)
    {
        SetSel(penLink->chrg);//这是链接的文字范围
        long Res = GetSelText((char *)LinkChar);//这是链接文字
        //后面是你的处理过程
        ......
    }
}