Option Explicit Private fin As Boolean Private Sub Command1_Click() fin = True End Sub Private Sub Form_Load() Dim clr As Boolean Me.Show Command1.Caption = "Arrêt" DoEvents Do If fin Then Exit Do If clr Then Label1.BackColor = &HFF& clr = False Else Label1.BackColor = &HFF00& clr = True End If DoEvents Loop Until 0 End Sub