Make CRectTracker object top-most - c++

Question

I have an MFC dialog application where the user can upload a photo and it will be displayed within the dialog. After they have uploaded an image they will be able select a region of this image and for this I am using the CRectTracker class. My problem however is that the tracker is currently being displayed behind the image.
What I have tried so far is:
Googling how to set the z-order of the CRectTracker object, but cannot seem to find any documentation on it.
Set the z-order of the image to the bottom using SetWindowPos(&wndBottom,...) but the tracker still appears behind the image.
I am using a Picture Control (type Bitmap) to display the image.
EDIT:
I draw the tracker in the OnPaint() method of my dialog class like this:
CPaintDC dc(this);
m_tracker.Draw(&dc);
which is being called by this->Invalidate(); in OnLButtonDown and OnMouseMove whenever I need to refresh the tracker:
void CTAB3::OnLButtonDown(UINT nFlags, CPoint point)
{
if (m_tackerFlag)
{
int nHitTest;
nHitTest = m_tracker.HitTest(point);
if (nHitTest < 0) // if the mouse down point is outside of the rect tracker
{
m_start = point; // Record the start drawing point
m_bDraw = TRUE; // set m_bDraw (in handle funtion WM_MOUSEMOVE will test this to decide whether to draw)
}
else // if the mouse down point is inside of the rect tracker
{
m_tracker.Track(this, point, FALSE); // start drag the rect tracker
this->Invalidate(); // make the window paint to refresh the track
}
}
CDialogEx::OnLButtonDown(nFlags, point);
}
void CTAB3::OnMouseMove(UINT nFlags, CPoint point)
{
// m_bDraw is set to true in funtion OnLButtonDown and set to false in funtion OnLButtonDown
// m_bDraw is use for testing if the mouse is moved along with the left button is pressed.
if (m_bDraw)
{
m_tracker.m_rect.SetRect(m_start, point); // set the rect of rect tracker
this->Invalidate(); // make the window paint to refresh the rect
}
CDialogEx::OnMouseMove(nFlags, point);
}
EDIT2:
Based on #ConstantineGeorgiou comment I decided to keep trying to implement the tracker with the resize handles using Track() as this would be the preferred solution for my project. I finally managed to draw the tracker on top of the image, but I am not particularly happy with the solution I ended up with. Basically I moved the Draw() function to the mouse move handler, so that the tracker is drawn after the OnPaint() has drawn everything else on the dialog. If anyone has any suggestion on better ways to do this, I would be very grateful for any feedback.
This is how I implemented it with the Draw() in the OnMouseMove() handler:
//In the header file:
BOOL m_bDraw = FALSE
void CTAB3::OnLButtonDown(UINT nFlags, CPoint point)
{
if (m_tackerFlag)
{
m_tracker.Track(this, point, FALSE); // start drag the rect tracker
this->Invalidate();
m_bDraw = TRUE;
}
CDialogEx::OnLButtonDown(nFlags, point);
}
void CTAB3::OnMouseMove(UINT nFlags, CPoint point)
{
if (m_bDraw)
{
//Draw tracker
CDC* dc = GetDC();
m_tracker.Draw(dc);
}
CDialogEx::OnMouseMove(nFlags, point);
}
BOOL CTAB3::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
if (m_tackerFlag)
{
if (pWnd == this && m_tracker.SetCursor(this, nHitTest))
{
return TRUE;
}
}
return CDialogEx::OnSetCursor(pWnd, nHitTest, message);
}
void CTAB3::OnPaint()
{
CPaintDC dc(this); // device context for painting
//m_tracker.Draw(&dc);
}