Private Sub CommandButton1_Click()
Dim Trouve As Range
With Sheets("BPU")
.Range("E:E").Interior.Color = xlNone
On Error Resume Next : Set Trouve = .Range("A:A").Find(TextBox1) : On Error GoTo 0
If Not Trouve Is Nothing Then .Range("E" & Trouve.Row).Interior.Color = RGB(255, 255, 0)
End With
End Sub