How to hide the Popup window when you move the mouse pointer out of the Popup window?

this.dateTimeControl1.MouseLeave += new EventHandler(dateTimeControl1_MouseLeave);
void dateTimeControl1_MouseLeave(object sender, EventArgs e)
{
    if (!this.dateTimeControl1.Bounds.Contains(popupControlContainer1.PointToClient(Cursor.Position)))
        this.popupControlContainer1.HidePopup(PopupCloseType.Deactivated);
}

AddHandler dateTimeControl1.MouseLeave, AddressOf dateTimeControl1_MouseLeave
Private Sub dateTimeControl1_MouseLeave(ByVal sender As Object, ByVal e As EventArgs)
    If Not Me.dateTimeControl1.Bounds.Contains(popupControlContainer1.PointToClient(Cursor.Position)) Then
        Me.popupControlContainer1.HidePopup(PopupCloseType.Deactivated)
    End If
End Sub