The Grid Control

m_DropTarget.Register(this)

if (GetDragAndDrop())
{
	m_DropTarget.Register(this);
}

// draw vertical lines (drawn at ends of cells)
if (m_nGridLines == GVL_BOTH || m_nGridLines == GVL_VERT)
{
   .
   .
   .
   // LUC - frozen col stuff
   if(col == (m_nFixedCols + m_nFreezedCols))

// DP 13/09/2011: Fix - this fails when the first non-fixed column is invisible -
// we skip past it in the previous line, and the column never gets shifted to
// minVisibleCol
if(col >= (m_nFixedCols + m_nFreezedCols) && col < minVisibleCol)

else if (m_MouseMode == MOUSE_SIZING_COL)
{
    CRect rect;
    GetClientRect(rect);
    CRect invertedRect(m_LastMousePoint.x, rect.top, m_LastMousePoint.x + 2, rect.bottom);

    CDC* pDC = GetDC();
    if (pDC)
    {
        pDC->InvertRect(&invertedRect);
        ReleaseDC(pDC);
    }

    if (m_LeftClickDownPoint != point && (point.x != 0 || point.y != 0)) // 0 pt fix by email1@bierling.net
    {
        CPoint start;
        if (!GetCellOrigin(m_LeftClickDownCell, &start))
        {
            return;
        }

        int nCol         = m_LeftClickDownCell.col;
        int nColumnWidth = max(point.x - start.x, m_bAllowColHide? 0 : 1);

        // check our new boolean to see if we want the original behavior or the new behavior
        if (!m_bAllowFrozenColumnResize)
        {
            SetColumnWidth(nCol, nColumnWidth);
        }
        else
        {
            // This code allows you to resize a column in either direction.
            // The column side you're resizing towards remains frozen in
            // place.  This allows you to anchor the edge of the grid and
            // resize the columns within it.  jms - 02/07/2005
            if (nCol < GetColumnCount() - 1)
            {
                int nThisColWidth = GetColumnWidth(nCol);
                int nNextColWidth = GetColumnWidth(nCol + 1);
                int nWidthDiff    = nThisColWidth - nColumnWidth;

                int nNewWidth = 0;
                // grid wackiness - depending on if the nCol is shrinking or growing, we have to set
                // column widths for the two affected columns in a different order
                if (nWidthDiff > 0)
                {
                    nNewWidth = nNextColWidth + nWidthDiff;
                    SetColumnWidth(nCol, nColumnWidth);
                    SetColumnWidth(nCol + 1, nNewWidth);
                }
                else
                {
                    nNewWidth = nNextColWidth - (nColumnWidth - nThisColWidth);
                    SetColumnWidth(nCol + 1, nNewWidth);
                    SetColumnWidth(nCol, nColumnWidth);
                }
            }
        }

        ResetScrollBars();
        Invalidate();
    }
}

protected:
	BOOL m_bAllowFrozenColumnResize;

public:
	void SetFrozenColumnResize(BOOL bVal) { m_bAllowFrozenColumnResize = bVal; };