How to enable the combobox to be read only mode. It should not be editable.

In VB.Net Windows programming,
I am using combobox. At the top or first item is --Select City--.
I need two things.
1.First how to make it non editable.
2.How to reset it to --Select City-- on click on reset button.
searchsanjaysharmaAsked:
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nepaluzCommented:
1. Set the DropDownStyle to list,e.g
        Dim xc As New ComboBox
        xc.DropDownStyle = ComboBoxStyle.DropDownList

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2. Add this to your Rest Button click event
xc.SelectedValue = "--Select City--"

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searchsanjaysharmaAuthor Commented:
cmblastqualification.SelectedValue = "--Select Last Qualification"
            cmbcourse.SelectedValue = "--Select Course--"

This code is not working, here cmblastqualification and cmbcourse are the combboxes.
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nepaluzCommented:
You need to add those values before you can set them i.e
cmbcourse.Items.Add("--Select Course--")
'then
cmbcourse.SelectedValue = "--Select Course--"

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PS. Do NOT add the item in the click event, add it inthe form load
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CodeCruiserCommented:
You can also use SelectedIndex to 0 to select the first item in combobox.
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searchsanjaysharmaAuthor Commented:
ok
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