怎么获取mfc的窗口消息处理函数?

如何获取mfc的窗口消息处理函数???
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------解决方案--------------------

LRESULT CALLBACK EDProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)

{// get oldproc

	WNDPROC OldEdProc=(WNDPROC)GetProp(hWnd,"EditOldProc");	

	char buf[100]= {0};

	switch(Msg)

    {

	case WM_NOTIFY:

//		OutputDebugString("notify\n");

		break;

	case WM_KEYUP:

//		OutputDebugString("WM_KEYUP\n");

		break;

	case WM_CHAR:

		if((TCHAR) wParam==VK_RETURN)

		{

			CallWindowProc(OldEdProc, hWnd, Msg, wParam, lParam);

			POINT pt;

			DWORD pos;

			int idx;

			// insert the indent 

			GetCaretPos(&pt);

			pos=SendMessage(hWnd,EM_CHARFROMPOS,0,MAKELPARAM(pt.x, pt.y));

			idx=LOWORD(pos);

			SendMessage(hWnd,EM_SETSEL,idx,idx);

			SendMessage(hWnd,EM_REPLACESEL,0,(LPARAM)"    ");

			return 0;

		}

		break;

#if 0

	case WM_PAINT:

		hdc=BeginPaint(hWnd,&ps);

// WS_BORDER 

		Rectangle(hdc,ps.rcPaint.left,ps.rcPaint.top,ps.rcPaint.right,ps.rcPaint.bottom);

// ES_MULTILINE	

		lines=SendMessage(hWnd,EM_GETLINECOUNT,0,0);

		for(jj=0;jj<lines;jj++)

		{// use GetWindowText will lost CR

			got=SendMessage(hWnd,EM_GETLINE,jj,(LPARAM)txt);

			txt[got]=0;

			if(jj==1)

			{

				SetTextColor(hdc,RGB(255,0,0));

				TextOut(hdc,2,2 + jj*16,txt,got);

			}

			else

			{

				SetTextColor(hdc,RGB(0,0,0));

				TextOut(hdc,2,2 + jj*16,txt,got);

			}

		}

		EndPaint(hWnd,&ps);

		return 0;

#endif

	}

	return CallWindowProc(OldEdProc, hWnd, Msg, wParam, lParam);

}