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Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ComboBox1.DropDownStyle = ComboBoxStyle.DropDownList
End Sub
Private Sub ComboBox1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ComboBox1.MouseDown
ComboBox1.Enabled = False
End Sub
Private Sub ComboBox1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ComboBox1.MouseUp
ComboBox1.Enabled = True
End Sub
End Class