Line colors in a bargraph

ColorNum and m_Array are set before entry which works fine except for all
bars are outlined in black
which is not a major problem, but would like to eliminate.
How do I draw the line in the code below a different color than the bars?

Below is a snip from my BarChart() routine:

  CBrush BlackBrush(RGB(10,10,10));
  CBrush CyanBrush(RGB(1,39,229));
  CBrush MagentaBrush(RGB(176,4,174));
  CBrush YellowBrush(RGB(187,176,3));
  CBrush GrayBrush(RGB(230,230,230));

  if (m_Array.GetSize())
  {

// ***** THE PROBLEM IS HERE WHERE I WOULD LIKE THE DRAWN LINE TO BE LIGHT
GRAY *****

    MemDC.SelectObject(GrayBrush);
    MemDC.Rectangle(1, (cr.Height()/2), cr.Width()-1, (cr.Height()/2)+1);

// ***** THIS LINE IS ALLWAYS BLACK *****

    int c=35,b=5;
    int d = (cr.Width()-20)/m_Array.GetSize();

    if (ColorNum==0)
      MemDC.SelectObject(BlackBrush);
    if (ColorNum==1)
      MemDC.SelectObject(CyanBrush);
    if (ColorNum==2)
      MemDC.SelectObject(MagentaBrush);
    if (ColorNum==3)
      MemDC.SelectObject(YellowBrush);
    for (b=0; b<m_Array.GetSize(); b++)
    {
      int a = (m_Array.GetAt(b))+1;
      MemDC.Rectangle(c, cr.Height()-17, c+10, cr.Height()-a-17);
      c+=d;
    }
  }
  dc.BitBlt(0,0,cr.Width(),cr.Height(),&MemDC,0,0,SRCCOPY); //dump
everything from memory dc to dialog

  MemDC.RestoreDC(SavedDC1);