ScreenToGif.Modern.tbSize_Leave C# (CSharp) Method

        private void tbSize_Leave(object sender, EventArgs e)
        {
            Application.DoEvents();
            _screenSizeEdit = true;
            int heightTb = Convert.ToInt32(tbHeight.Text);
            int widthTb = Convert.ToInt32(tbWidth.Text);

            int offsetY = this.Height - panelTransparent.Height;
            int offsetX = this.Width - panelTransparent.Width;

            heightTb += offsetY;
            widthTb += offsetX;

            #region Checks if size is smaller than screen size

            if (heightTb > _sizeScreen.Y)
            {
                heightTb = _sizeScreen.Y;
                tbHeight.Text = _sizeScreen.Y.ToString();
            }

            if (widthTb > _sizeScreen.X)
            {
                widthTb = _sizeScreen.X;
                tbWidth.Text = _sizeScreen.X.ToString();
            }

            #endregion

            this.Size = new Size(widthTb, heightTb);

            _screenSizeEdit = false;
        }