How to disable the particular date in WinForms DateTimePicker (DateTimePickerAdv)?

void Calendar_DateCellQueryInfo(object sender, Syncfusion.Windows.Forms.Tools.DateCellQueryInfoEventArgs e)
{
    // This event enables user to customize MonthCalenderAdv DateCells
    if (e.RowIndex == 3 && e.ColIndex > 6)
    {
         e.Style.BackColor = Color.Snow;
         e.Style.Enabled = false;             
    }
    else
    {
         // To set selectable Date cells BackColor
         e.Style.BackColor = Color.FromArgb(13, 134, 64);
    }
}

Private Sub Calendar_DateCellQueryInfo(sender As Object, e As Syncfusion.Windows.Forms.Tools.DateCellQueryInfoEventArgs)
    ' This event enables user to customize MonthCalenderAdv DateCells
    If e.RowIndex = 3 AndAlso e.ColIndex > 6 Then
       e.Style.BackColor = Color.Snow
       e.Style.Enabled = False
    Else
       ' To set selectable Date cells BackColor
       e.Style.BackColor = Color.FromArgb(13, 134, 64)
    End If
End Sub