请教哪有WinCE4上的五笔输入法上载，怎样将它加入到小弟我定制的系统中去，系统运行时怎么切换输入法

// HandWriting.cpp : Implementation of DLL Exports.


// Note: Proxy/Stub Information
//        To build a separate proxy/stub DLL, 
//        run nmake -f HandWritingps.mk in the project directory.

#include "stdafx.h"
#include "resource.h"
#include "initguid.h"
#include <commctrl.h>
#include <aygshell.h>
#include <sipapi.h>
#include "dllmain.h"
#include "HandWriting.h"
#include "HandWriting_classfactory.h"

#include "HandWriting_i.c"

// constant strings that we use for registering the server
#define PENINPUT        TEXT("xx输入法")
#define STRING_ONE        TEXT("1")
#define ICON_NAME        TEXT("\\windows\\HandWriting.dll,0")
#define EXEPATH            TEXT("\\windows\\HandWriting.dll")



DWORD        g_dwObjectCount;
HINSTANCE    g_hInstDll;

CComModule    _Module;

BEGIN_OBJECT_MAP(ObjectMap)
END_OBJECT_MAP()

/////////////////////////////////////////////////////////////////////////////
// DLL Entry Point

extern "C" BOOL WINAPI DllMain(HANDLE hInstance, DWORD dwReason, LPVOID)
{
    if (dwReason == DLL_PROCESS_ATTACH)
    {
        g_hInstDll = (HINSTANCE)hInstance;
        _Module.Init(ObjectMap, (HINSTANCE)hInstance);
    }
    else if (dwReason == DLL_PROCESS_DETACH)
    {
        _Module.Term();
    }
    return TRUE;    
}

/////////////////////////////////////////////////////////////////////////////
// Used to determine whether the DLL can be unloaded by OLE

STDAPI DllCanUnloadNow(void)
{
    if( !g_dwObjectCount )
    {
        return NOERROR;
    }

    return S_FALSE;
}

/////////////////////////////////////////////////////////////////////////////
// Returns a class factory to create an object of the requested type

STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID* ppv)
{
    HRESULT hr;
    
    CClassFactory *pClassFactory = new CClassFactory( rclsid );
    
    if( pClassFactory ) 
    {
        hr = pClassFactory->QueryInterface( riid, ppv );
        RELEASE( pClassFactory );

        return hr;
    }

    return E_OUTOFMEMORY;
}

// add all the registry entries needed to make this CLSID into a SIP
HRESULT RegisterAClsid(LPTSTR pszClsid)
{
    LONG        lRC;
    HKEY        hClsidKey;
    HKEY        hGuidKey;
    HKEY        hRegKey;
    DWORD        dwDisposition;

     lRC = RegOpenKey(HKEY_CLASSES_ROOT, TEXT("CLSID"), &hClsidKey);
    if (ERROR_SUCCESS != lRC)
    {
        OutputDebugString(TEXT("Failed to create the CLSID key"));
        return E_FAIL;
    }

    // create the base key for the OLE object under clsid
    lRC = RegCreateKeyEx(hClsidKey, pszClsid,
                         0, TEXT("REG_SZ"), 0, KEY_WRITE, NULL, &hGuidKey, &dwDisposition);
    if (ERROR_SUCCESS != lRC)
    {
        RegCloseKey(hClsidKey);
        return E_FAIL;
    }

    // now set the named value under this key
    lRC = RegSetValueEx(hGuidKey, NULL, 0, REG_SZ, (BYTE*) PENINPUT, 
                        sizeof(TCHAR)*(1+_tcslen(PENINPUT)));
    if (ERROR_SUCCESS != lRC)
    {
        RegCloseKey(hGuidKey);
        RegCloseKey(hClsidKey);
        return E_FAIL;
    }

    // now, create the standard OLE server key
    lRC = RegCreateKeyEx(hGuidKey, TEXT("InprocServer32"),
                         0, TEXT("REG_SZ"), 0, KEY_WRITE, NULL, &hRegKey, &dwDisposition);
    if (ERROR_SUCCESS != lRC)
    {
        RegCloseKey(hGuidKey);
        RegCloseKey(hClsidKey);
        return E_FAIL;
    }

    // now set the named value under this key
    lRC = RegSetValueEx(hRegKey, NULL, 0, REG_SZ,  (BYTE*) EXEPATH, 
                        sizeof(TCHAR)*(1+_tcslen(EXEPATH)));
    if (ERROR_SUCCESS != lRC)
    {
        RegCloseKey(hRegKey);
        RegCloseKey(hGuidKey);
        RegCloseKey(hClsidKey);
        return E_FAIL;
    }
    RegCloseKey(hRegKey);

    // this is the *only* thing which marks this as a sip
    lRC = RegCreateKeyEx(hGuidKey, TEXT("IsSIPInputMethod"),
                         0, TEXT("REG_SZ"), 0, KEY_WRITE, NULL, &hRegKey, &dwDisposition);
    if (ERROR_SUCCESS != lRC)
    {
        RegCloseKey(hGuidKey);
        RegCloseKey(hClsidKey);
        return E_FAIL;
    }

    // now set the named value under this key
    lRC = RegSetValueEx(hRegKey, NULL, 0, REG_SZ,  (BYTE*) STRING_ONE, 
                        sizeof(TCHAR)*(1+_tcslen(STRING_ONE)));
    if (ERROR_SUCCESS != lRC)
    {
        RegCloseKey(hRegKey);
        RegCloseKey(hGuidKey);
        RegCloseKey(hClsidKey);
        return E_FAIL;
    }
    RegCloseKey(hRegKey);

    // this controls the icon we see in the sip menu
    lRC = RegCreateKeyEx(hGuidKey, TEXT("DefaultIcon"),
                         0, TEXT("REG_SZ"), 0, KEY_WRITE, NULL, &hRegKey, &dwDisposition);
    if (ERROR_SUCCESS != lRC)
    {
        RegCloseKey(hGuidKey);
        RegCloseKey(hClsidKey);
        return E_FAIL;
    }

    // now set the named value under this key
    lRC = RegSetValueEx(hRegKey, NULL, 0, REG_SZ,  (BYTE*) ICON_NAME, 
                        sizeof(TCHAR)*(1+_tcslen(ICON_NAME)));
    if (ERROR_SUCCESS != lRC)
    {
        RegCloseKey(hRegKey);
        RegCloseKey(hGuidKey);
        RegCloseKey(hClsidKey);
        return E_FAIL;
    }
    RegCloseKey(hRegKey);

    RegCloseKey(hGuidKey);

    RegCloseKey(hClsidKey);

    return S_OK;
}

/////////////////////////////////////////////////////////////////////////////
// DllRegisterServer - Adds entries to the system registry

STDAPI DllRegisterServer(void)
{
    HRESULT    hr = S_OK;
    
    hr = RegisterAClsid(TEXT("{42429695-AE04-11D0-A4F8-00AA00A749B9}"));
    return hr;

}

/////////////////////////////////////////////////////////////////////////////
// DllUnregisterServer - Removes entries from the system registry

STDAPI DllUnregisterServer(void)
{
    _Module.UnregisterServer();
    return S_OK;
}