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Hi All,

I am working on a C#.Net Windows application and I want to display tool tips for every item in a combobox as the text is getting clipped for some of the items. This is what I am presently doing in my code :

private void Form2_Load(object sender, EventArgs e)
    comboBox1.DrawMode = DrawMode.OwnerDrawFixed;

private void comboBox1_DrawItem(object sender, DrawItemEventArgs e)
    string text = comboBox1.GetItemText(comboBox1.Items[e.Index]);
    using (SolidBrush br = new SolidBrush(e.ForeColor))
    { e.Graphics.DrawString(text, e.Font, br, e.Bounds); }
    if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
    { toolTip1.Show(text, comboBox1, e.Bounds.Right, e.Bounds.Bottom); }

private void comboBox1_DropDownClosed(object sender, EventArgs e)

The problem I am facing here is that if the comboBox is located near the edge of the form(the form opens in maximized mode), the tool tip flickers.

Please suggest a solution.

Thanks in advance.

Gitika Khurana
Updated 18-Jul-12 19:24pm

1 solution


set DoubleBuffered property of the form to True on Form_Load.

this.DoubleBuffered = true;

This will remove the flickering.

Hope this helps.

Happy Coding :)
Share this answer
CodeDZStar 19-Jul-12 3:05am    
my 5+!
Sunny_Kumar_ 19-Jul-12 3:06am    
gitika.khurana 20-Jul-12 5:59am    
That did not work for me.

From what I can observe, I think there aint enough space to the right of the point where the tooltip is being drawn, thats why it keeps on re-drawing the tool-tip over and over, hence the flickering. I have tried relocating the tool tip to middle of the form and it works fine.
Sunny_Kumar_ 20-Jul-12 6:16am    
yeah, you're right, that may be the case of problem.

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