Code:
pDC->SetMapMode(MM_TEXT);
// Paint white color as the background
pDC->FillSolidRect(origin.x, origin.y, 2000, 2000, RGB(255,255,255));
int cx = 5;
int cy = 5;
CPen pen, pen2;
pen.CreatePen(PS_SOLID,2, RGB(0,0,0));
pDC->SelectObject(&pen);
pDC->Rectangle(cx,cy,(cx +256), (cy + 192));
pDC->SetPixel(45,10, RGB(255,0,0));
pDC->SetPixel(47,9, RGB(255,0,0));
pDC->SetPixel(79,45, RGB(255,0,0));
pDC->SetPixel(46,120, RGB(255,0,0));
pen2.CreatePen(PS_SOLID,1, RGB(0,0,255));
pDC->SelectObject(&pen2);
pDC->MoveTo(45,10);
pDC->LineTo(79,45);