// store image to drag in Data object
private void _flex_StartDrag(object sender, System.Windows.Forms.DragEventArgs e)
{
int row = _flex.MouseRow;
int col = _flex.MouseCol;
if (row > -1 && col > -1)
{
Image img = _flex.GetCellImage(row, col);
if (img != null)
{
e.Data.SetData(img);
}
}
}