谁有这种自定义控件的源码
单位名称:____________________…  


(…是按钮)

____________________ 跟TextBox一个功能.

------解决方案--------------------
public class UnderLineBox : TextBox 
{ 
private bool m_underLine; 

public bool UnderLine 
{ 
get { return m_underLine; } 
set
{ 
if (this.m_underLine != value) 
{ 
if(value) 
{ 
this.BorderStyle = BorderStyle.None; 
} 
m_underLine = value; 
} 
} 
} 
protected override void WndProc(ref Message m) 
{ 
base.WndProc(ref m); 
if(m.Msg == 0xf || m.Msg == 0x14 || m.Msg == 0x85) 
{ 
if(this.BorderStyle == BorderStyle.None) 
{ 
if(m_underLine) 
{ 
using(Graphics g = Graphics.FromHwnd(this.Handle)) 
{ 
g.DrawLine(SystemPens.ControlText, 0, this.Height - 1, this.Width - 1, this.Height - 1); 
} 
} 
} 
} 
} 
} 
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