Private Sub dgv_Files_Leave(sender As Object, e As EventArgs) Handles _
      dgv_Files.Leave
        dgv_Files.CancelEdit()
    End Sub
 
 
    Private Sub dgv_Files_CellLeave(sender As Object, e As _
      DataGridViewCellEventArgs) Handles dgv_Files.CellLeave
        dgv_Files.CancelEdit()
    End Sub
 
 
    Private Sub dgv_Files_CellValidating(sender As Object, e As _
      DataGridViewCellValidatingEventArgs) Handles dgv_Files.CellValidating
        If dgv_Files.IsCurrentCellDirty Then
            Dim currentValue As Object = dgv_Files.CurrentCell.Value
            Dim newValue As Object = e.FormattedValue
 
            ' Überprüfen, ob die Änderungen ungültig sind
            If Not CheckFileName(newValue) Then
                dgv_Files.CancelEdit()
            End If
        End If
    End Sub