C#

private PictureBox HomeLastPicBox = new PictureBox(); 
 
    private TableLayoutPanelCellPosition homeLastPosition = new TableLayoutPanelCellPosition(0, 0); 
 
    private void HomeTableLayoutPanel_MouseMove(object sender, MouseEventArgs e) 
    { 
 
        PictureBox NowPicControl = (PictureBox)(HomeTableLayoutPanel.GetChildAtPoint(e.Location)); 
 
        if ((NowPicControl != null) && (NowPicControl != HomeLastPicBox)) 
        { 
 
            HomeLastPicBox = (PictureBox)(HomeTableLayoutPanel.GetControlFromPosition(homeLastPosition.Column, homeLastPosition.Row)); 
 
            if (GameModel.HomeCellStatus(homeLastPosition.Column, homeLastPosition.Row) == Cell.cellState.WATER) 
            { 
                HomeLastPicBox.Image = Properties.Resources.water; 
            } 
 
            TableLayoutPanelCellPosition homeCurrentPosition = HomeTableLayoutPanel.GetCellPosition(NowPicControl); 
 
            if (GameModel.HomeCellStatus(homeCurrentPosition.Column, homeCurrentPosition.Row) == Cell.cellState.WATER) 
            { 
                NowPicControl.Image = Properties.Resources.scan; 
            } 
            homeLastPosition = homeCurrentPosition; 
        } 
    } 

 private void HomeTableLayoutPanel_MouseLeave(object sender, EventArgs e)
{
    MessageBox.Show("col " + homeLastPosition.Column.ToString() + " row " + homeLastPosition.Row.ToString());
    if (GameModel.HomeCellStatus(homeLastPosition.Column, homeLastPosition.Row) == Cell.cellState.WATER)
    {
        HomeLastPicBox.Image = Properties.Resources.water;
        MessageBox.Show("hi");
    }
    HomeLastPicBox = new PictureBox();
}