How do I make colour changes on mouse movement?

[Shmokin]

I have got four option boxes on my form and when i put my mouse over the option boxes I want then to change colour.

What I have at the moment is,

Private Sub opt1_MouseMove()
 
    Let opt1.BackColor = vbYellow
    Let opt2.BackColor = vbGreen
    Let opt3.BackColor = vbGreen
    Let opt4.BackColor = vbGreen
    
End Sub

Could someone please help?

EDIT

I'm using VBA and i would like the colour of the option boxes to change when they are selected or clicked on