Re: Drawing disappears when window dragged

Thanks.
But now the drawings flash once and disappear.
I moved the code for drawing to after CDialog::OnPaint().

Originally the drawing region is a static picture rectangle.
After I changed the type to frame, flashing does not occur anymore.
What's the reason behind? Is that the solid rectangle is drawn after my
drawings, so that they are covered immediately?

void CPiezoDlg::OnPaint()
{

    if (IsIconic())
    {
        CPaintDC dc(this); // device context for painting
                                ...
    }
    else
    {
        CDialog::OnPaint();
        //Moved codes for drawing here
    }
}