Instead of only the little tiny down arrow? Seems like th开发者_如何转开发ere should be a property I can set or something, but I'm not seeing one... unless I'm blind.
Are you looking for
comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
maybe? That will make the combo box non-editable, i.e. it won't act like a text box with a button but just as a large button that will open the drop-down.
If the combobox DropDownStyle is set to DropDownList, it will be automatic
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