Shifts the whole image according to mose movements
If the left mouse button is pressed, then computes the relocation of the image both in x and y direction (m_scrollx, m_scrolly) as the difference of the current mouse position and the initial mouse position stored in OnMouseDown().
BmpMapForm Class | serial Namespace | OnMouseUp | OnMouseDown | m_mouseoldx | m_mouseoldy | m_scrolldx | m_scrolldy