Multiline Hyper Edit Control

pDC->TextOut(pt.x, pt.y, chToken); // Draw overtop of existing character

CSize sz = pDC->GetTextExtent(chToken);
pDC->FillSolidRect(pt.x, pt.y, sz.cx, sz.cy, GetStyle()&ES_READONLY?GetSysColor(COLOR_BTNFACE):pDC->GetBkColor());
pDC->TextOut(pt.x, pt.y, chToken); // Draw overtop of existing character

// Draw our hyperlink(s)	
	for(int i=0; i<m_linkOffsets.size(); i++)
	{		   
		// Determine if mouse pointer is over a hyperlink
		csTemp = IsHyperlink(pt_mouse);
			
		// If return URL is empty then were not over a hyperlink
		if(csTemp.IsEmpty())		
			pDC->SetTextColor(m_clrNormal);
		else
		{
			// Make sure we only hilite the URL were over. This technique will
			// cause duplicate URl's to hilite in hover color.
			if(csTemp==csBuff.Mid(m_linkOffsets[i].iStart, m_linkOffsets[i].iLength))
			{				
				// Get the coordinates of last character in entire buffer
				CPoint pt_lastchar = SendMessage(MSG_GETPOSFROMCHAR,GetWindowTextLength()-1,0);//PosFromChar(GetWindowTextLength()-1);

				// Paint normally if mouse is below last visible character
				if(pt_mouse.y>(pt_lastchar.y+m_nLineHeight))
					pDC->SetTextColor(m_clrNormal);
				else
					pDC->SetTextColor(m_clrHover);
			}
			else
				pDC->SetTextColor(m_clrNormal);
		}
 
		int j = m_linkOffsets[i].iStart;
		CString strText;
		strText = csBuff.Mid(m_linkOffsets[i].iStart,m_linkOffsets[i].iLength);
		pt = ::SendMessage(m_hWnd,MSG_GETPOSFROMCHAR,j, 0);//PosFromChar(j);
		//pt = GetPosFromChar(j);
		pDC->TextOut(pt.x,pt.y,strText);
 
#if 0
		// Paint each URL, email, etc character individually so we can have URL's that wrap
		// onto different lines
		for(int j=m_linkOffsets[i].iStart; j<(m_linkOffsets[i].iStart+m_linkOffsets[i].iLength); j++)
		{	
			TCHAR chToken = csBuff.GetAt(j); // Get a single token from URL, Email, etc
			pt = PosFromChar(j); // Get the coordinates for a single token

			// Holds the start and finish offset of current selection (if any)
			int iSelStart=0, iSelFinish=0; 
 
			GetSel(iSelStart, iSelFinish);
 
			// Determine if there is a selection
			if(IsSelection(iSelStart, iSelFinish))
			{
				// Does our current token fall within a selection range
				if(j>=iSelStart && j<iSelFinish)
					continue; // Don't paint token blue, it's selected!!!
				else 
				{
					if ((unsigned char)chToken<0x80)
					{
						pDC->TextOut(pt.x, pt.y, chToken); // Draw overtop of existing character
					}
					else
					{
						TCHAR cText[3] = {0};
						cText[0] = csBuff.GetAt(j);
						cText[1] = csBuff.GetAt(j+1);
						pDC->TextOut(pt.x,pt.y,cText);
						j++;
					}
				}
			}
			else // No selection, just draw normally
			{
				if ((unsigned char)chToken<0x80)
				{
					pDC->TextOut(pt.x, pt.y, chToken); // Draw overtop of existing character
				}
				else
				{
					TCHAR cText[3] = {0};
					cText[0] = csBuff.GetAt(j);
					cText[1] = csBuff.GetAt(j+1);
					pDC->TextOut(pt.x,pt.y,cText);
					j++;
				}
			}
		}
#endif

void CHyperEdit::PreSubclassWindow() 
{
    ...
 
    CDC* pDC = GetDC();
    ASSERT(pDC);
 
    ...
 
    // free resources
    ReleaseDC(pDC);  // <===== called once =====
}

void CHyperEdit::DrawHyperlinks()
{
    ...
 
    CDC* pDC = GetDC(); 
    ASSERT(pDC);
 
    ...
 
    // free resources
    pDC->SelectObject(pTemp); // Restore original font (Free hyperlink font)
    ReleaseDC(pDC);  // <===== can be called very very often! seriously! =====
}

CHyperEdit::~CHyperEdit()
{
    if (m_oFont.m_hObject != NULL)
    {
        m_oFont.DeleteObject();
    }
 
    if (m_hHandCursor != NULL)
    {
        DestroyCursor(m_hHandCursor);  // <==========
    }
}

<code>
void CHyperEdit::OnMouseMove(UINT nFlags, CPoint point) 
{
	CEdit::OnMouseMove(nFlags, point);						  
	CString csURL = IsHyperlink(point);
 
	// If not empty, then display hand cursor
	if(!csURL.IsEmpty()){ // We are hovering hypertext
		
		// Get the coordinates of last character in entire buffer
		CPoint pt_lastchar = PosFromChar(GetWindowTextLength()-1);
 
		// Don't bother changing mouse cursor if it's below last visible character
		if(point.y<=(pt_lastchar.y+m_nLineHeight))		
			::SetCursor(m_hHandCursor);
 
		
		if (!m_bHoveringHyperText) {	 //only redraw if state has changed
			DrawHyperlinks();			 
			m_bHoveringHyperText = true; //store new state
		}
 
	} else {			 // We are not hovering hypertext
		if (m_bHoveringHyperText) {	 //only redraw if state has changed
			DrawHyperlinks();
			m_bHoveringHyperText = false; //store new state
		}
	}
}
</code>