Display Image of ComboBox Item Selection

I want to display an image when the user selects an item from the ComboBox. Which Property should I use?

You don't say where the image comes from, how you want to display it, or how the image is related to the selection in the ComboBox. However, you can handle the ComboBox SelectedIndexChanged event and out you code to display the image in that handler.
Sub ComboBox1SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged
Dim cmb As ComboBox = CType(sender, ComboBox)
Dim selectedItem As Object = cmb.SelectedItem
'Do something to display an image somewhere
End Sub

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