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

        private void OnHandleCreated(object sender, EventArgs args)
        {
            const int ES_NUMBER = 0x2000;
            const int GWL_STYLE = -16;

            int style = GetWindowLong(Handle, GWL_STYLE);
            SetWindowLong(Handle, GWL_STYLE, style | ES_NUMBER);
        }