BelhardTraining.Windows.Forms.Controls.PlaceholderTextBox.OnHandleCreated C# (CSharp) Метод

        protected override void OnHandleCreated(EventArgs e)
        {
            base.OnHandleCreated(e);
            if (!string.IsNullOrWhiteSpace(_placeholderText))
            {
                SendMessage(Handle, EM_SETCUEBANNER, 0, _placeholderText);
            }
        }