System.Windows.Forms.TextBoxBase.IsInputKey C# (CSharp) Method

		protected override bool IsInputKey (Keys keyData)
		{
			if ((keyData & Keys.Alt) != 0)
				return base.IsInputKey(keyData);

			switch (keyData & Keys.KeyCode) {
				case Keys.Enter: {
					return (accepts_return && multiline);
				}

				case Keys.Tab: {
					if (accepts_tab && multiline)
						if ((keyData & Keys.Control) == 0)
							return true;
					return false;
				}

				case Keys.Left:
				case Keys.Right:
				case Keys.Up:
				case Keys.Down:
				case Keys.PageUp:
				case Keys.PageDown:
				case Keys.Home:
				case Keys.End: {
					return true;
				}
			}
			return false;
		}