MFC drawing hatched CBrush leaving the background unchanged

Question

Hi,

I want to draw a hatched brush but leave the background unchanged.

I tried :

CBrush m_HatchBrush(HS_BDIAGONAL,RGB(255, 0, 0));

p_DC->SelectObject(&m_HatchBrush);
p_DC->SetBkMode(TRANSPARENT);
p_DC->FillRect(m_DepartureRect, &m_HatchBrush); 

It draws the hatched square but the background is not showing it is always white. How do i get it to draw only the diagonal hatch lines and leave the rest blue (which is the background color of a chessboard square)