Winfrom TextBox 添加水印文字 + 字体颜色

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using System.Drawing; using System.Windows.Forms;   namespace KK.WaterMark.Control {     public partial class WaterMarkTextBox : TextBox     {         private string watermarkText;         public string WatermarkText         {             get { return watermarkText; }             set { watermarkText = value; }         }         private Color watermarkTextColor;         public Color WatermarkTextColor         {             get { return watermarkTextColor; }             set { watermarkTextColor = value; }         }           public WaterMarkTextBox()         {             InitializeComponent();         }           protected override void WndProc(ref Message m)         {             base.WndProc(ref m);               if (m.Msg ==0x000F )//WM_PAINT             {                 WmPaint(ref m);             }         }           private void WmPaint(ref Message m)         {             Rectangle rectangle = new Rectangle(0, 0, Width, Height);             using (Graphics graphics = Graphics.FromHwnd(base.Handle))             {                 if (Text.Length == 0                    && !string.IsNullOrEmpty(watermarkText)                    && !Focused)                 {                     TextFormatFlags format = TextFormatFlags.EndEllipsis                         | TextFormatFlags.VerticalCenter;                       if (RightToLeft == RightToLeft.Yes)                     {                         format |= TextFormatFlags.RightToLeft | TextFormatFlags.Right;                     }                       TextRenderer.DrawText(graphics, watermarkText, Font,                         base.ClientRectangle, watermarkTextColor, format);                 }             }         }     } }

运行效果如下所示：