最近我需要一个水印的文本框，那突然出现在我的头上的第一件事就是OnLeave和的OnEnter文本框的事件，但首先我GOOGLE了它，我有两个链接第一个是它使用了System.Drawing命名空间，另外一个在这里使用SendMessage（）在这里http://vidmar.net/weblog/archive/2008/11/05/watermarked-textbox-in-windows-forms-on-.net.aspx.

lately I needed a watermark textbox, the first thing that popped in to my head was OnLeave and OnEnter events of textbox, but first I googled it and I got two links first was the one in CodeProject which used the System.Drawing namespace and the other one was here using the SendMessage() over here http://vidmar.net/weblog/archive/2008/11/05/watermarked-textbox-in-windows-forms-on-.net.aspx.

我beleive的SendMessage函数则相对比较简单，它也有它自己没有闪烁。虽然我用它。

I beleive the SendMessage one is much easier and it also has no flickering in it. though I used it.

我希望这将是对你有所帮助。

I hope it will be helpful for you.