C#

public partial class MyComboThingy : Panel
{
    const int arrowLen = 23;
    Panel dropDownPanel = new Panel();
    bool open = false;
    TextBox TextBoxValue = new TextBox();

    public MyComboThingy()
    {
        this.MaximumSize = new Size(9999999, this.Height);
        this.makeSmaller();
        this.Controls.Add(TextBoxValue);
        TextBoxValue.Location = new Point(0, 0);
        makeSmaller();
        Paint += this._Paint;
    }

    void makeSmaller()
    {
        TextBoxValue.Width = Width - arrowLen;        
    }

    protected override void OnResize(EventArgs e)
    {
        base.OnResize(e);
        makeSmaller();
    }
    protected override void OnMouseClick(MouseEventArgs e)
    {
        base.OnMouseClick(e);
        open = !open;

        if (open)
        {
            dropDownPanel.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
            dropDownPanel.Parent = this.Parent;
            dropDownPanel.BackColor = Color.White;
            dropDownPanel.Location = new Point(
                this.Location.X, this.Location.Y + this.Height);
            dropDownPanel.Size = new Size(this.Width, 150);
            dropDownPanel.BringToFront();
            dropDownPanel.Show();
        }
        else
        {
            dropDownPanel.Hide();
        }
    }

    private void _Paint(object sender, PaintEventArgs e)
    {
        Rectangle myRect = new Rectangle(
            e.ClipRectangle.X + e.ClipRectangle.Width - arrowLen,
            e.ClipRectangle.Y,
            arrowLen, 
            e.ClipRectangle.Height);
        try
        {
            ControlPaint.DrawComboButton(
                e.Graphics, 
                myRect, 
                open ? ButtonState.Pushed : ButtonState.Normal);
        }
        catch
        { }
    }
}

Bastard Programmer from Hell

Pete O'Hanlon wrote:

Please don't crosspost. It's bad form.

Member 8374202 wrote:

Now please tell me how can I place this barcode image at a specific position in
a cell using coordinates & coding in c#.