怎样才可以有IE功能的ComboBox封装成一个控件

[Xin_ling]

各位高手，小弟做了一个IE游览器
现在想吧地址栏的功能的ComboBox封装成一个控件，请问要怎样才可以封装啊？？？
请各位帮忙啊？？小弟急用～～～～～～～～help～～～～～

[蒋晟]

http://www.codeproject.com/combobox/historycombo.asp
http://www.codeproject.com/wtl/customautocomplete_wtl.asp

[CACACACACA]

//---------------------------------------------------------------------------

#include <vcl.h>

#pragma hdrstop

#include "MYB.h"
#pragma package(smart_init)
#pragma resource "MYB.res"
//---------------------------------------------------------------------------
// ValidCtrCheck is used to assure that the components created do not have
// any pure virtual functions.
//

static inline void ValidCtrCheck(MYB *)
{
new MYB(NULL);
}
//---------------------------------------------------------------------------
__fastcall MYB::MYB(TComponent* Owner)
: TComboBox(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall MYB::CreateWnd()
{
TCustomComboBox::CreateWnd();
Items->Add("DELPHI");
Items->Add("C++Builder");
Items->Add("汇编");
Items->Add("数据结构和算法");
}
//---------------------------------------------------------------------------
void __fastcall MYB::ComboWndProc( TMessage &msg, HWND ComboWnd, void *ComboProc)
{
if( !ComponentState.Contains( csDesigning ) )
if( msg.Msg == WM_CHAR )
ShowMessage("ok");
TComboBox::ComboWndProc( msg, ComboWnd, ComboProc );
}
//---------------------------------------------------------------------------
namespace Myb
{
void __fastcall PACKAGE Register()
{
TComponentClass classes[1] = {__classid(MYB)};
RegisterComponents("Samples", classes, 0);
}
}
//---------------------------------------------------------------------------

[CACACACACA]

//---------------------------------------------------------------------------

#ifndef MYBH
#define MYBH
//---------------------------------------------------------------------------
#include <SysUtils.hpp>
#include <Classes.hpp>
#include <Controls.hpp>
#include <StdCtrls.hpp>
//---------------------------------------------------------------------------
class PACKAGE MYB : public TComboBox
{
private:
protected:
public:
__fastcall MYB(TComponent* Owner);
virtual void __fastcall CreateWnd();
void __fastcall MYB::ComboWndProc( TMessage &msg, HWND ComboWnd, void *ComboProc);
__published:

};
//---------------------------------------------------------------------------
#endif

[CACACACACA]

骨架有了,自己加点内容吧