WaterMark TextBox

Sometimes I have no other way to implement some marvellous special effects.

at this time ,I need WIN api or override wndproc(ref msg) .Like watermark TextBox....

 

 

public partial class WaterMarkTextBox :TextBox { private string _waterMarkText = string.Empty; [Browsable(true)] public string WaterMarkText { get { return _waterMarkText; } set { _waterMarkText = value; } } public WaterMarkTextBox() { InitializeComponent(); } protected override void WndProc(ref Message m) { base.WndProc(ref m); if (m.Msg == 0x000F) { if (this.Text.Length==0) { Brush brush = SystemBrushes.GrayText; Font font = this.Font; Graphics g = this.CreateGraphics(); g.DrawString(_waterMarkText, font, brush, this.ClientRectangle); } } } }