Bonjour,
Pour le principe.
A adapter.
Cdlt.
Private Sub CommandButton3_Click()
Dim ws As Worksheet, lastRow As Long, rng As Range
Set ws = Worksheets("Feuil1")
With ws
lastRow = .Cells(.Rows.Count, 1).End(xlUp).Row
Set rng = .Cells(4, 1).Resize(lastRow - 3)
MsgBox "Nombre d'occurences : " & WorksheetFunction.CountIf(rng, TextBox1.Value), 64, TextBox1.Value
End With
End Sub