关于vista 下的编程问题，望各位高手关注下，附原代码。也请袁大哥进来帮忙看下，Thanks

[kingstar568]

是这样的，我们想给一种新得文件格式给予缩略图，原先在vista之前一般用IExtractImage 来实现，在vista下出现新得结构IThumbnailProvider. 我们想用新接口来实现这一功能，但是程序中的Initialize始终不被调用。想问下
1,是否与原来的IExtractImage实现方式有所不同?
2,注册表修改的信息是否与原来的有所不同？
代码如下：

///////////////////////////////////NewThumbnail.cpp////////////////////////////////////
HRESULT CCNewThumbnail::Initialize( IStream *pStream,DWORD grfMode)
{
//这个函数没有被调用。导致GetThumbnail没被初始化。
return S_OK;
}
HRESULT CCNewThumbnail::GetThumbnail(UINT cx,HBITMAP *phbmp,WTS_ALPHATYPE *pdwAlpha)
{

*phbmp = ::LoadBitmap(NULL,MAKEINTRESOURCE(IDB_BITMAP));
*pdwAlpha = WTSAT_ARGB;

return S_OK;
}
HRESULT CCNewThumbnail::SetFocus(VOID)
{
return S_OK;
}
HRESULT CCNewThumbnail::QueryFocus(HWND *phwnd)
{
return S_OK;
}
HRESULT CCNewThumbnail::SetRect(const RECT *prc)
{
return S_OK;
}
HRESULT CCNewThumbnail::DoPreview()
{
return S_OK;
}
HRESULT CCNewThumbnail::Unload()
{
return S_OK;
}
HRESULT CCNewThumbnail::SetWindow(HWND hwnd,const RECT *prc)
{
return S_OK;
}
////////////////////////NewThumbnail.rgs////////////////////////////
HKCR
{
NewThumbnailTest.CNewThumbnail.1 = s 'CNewThumbnail Class'
{
CLSID = s '{F39D9D33-85D5-4AAA-9486-347B51B3792D}'
}
NewThumbnailTest.CNewThumbnail = s 'CNewThumbnail Class'
{
CLSID = s '{F39D9D33-85D5-4AAA-9486-347B51B3792D}'
CurVer = s 'NewThumbnailTest.CNewThumbnail.1'
}
NoRemove CLSID
{
ForceRemove {F39D9D33-85D5-4AAA-9486-347B51B3792D} = s 'CNewThumbnail Class'
{
ProgID = s 'NewThumbnailTest.CNewThumbnail.1'
VersionIndependentProgID = s 'NewThumbnailTest.CNewThumbnail'
ForceRemove 'Programmable'
InprocServer32 = s '%MODULE%'
{
val ThreadingModel = s 'Apartment'
}
val AppID = s '%APPID%'
'TypeLib' = s '{63B30B71-B44B-4265-B20F-7872A5F1D148}'
}
}
NoRemove .mm
{
PersistentHandler = s '{98DE59A0-D175-11CD-A7BD-00006B827D94}'

shellex
{
{8895b1c6-b41f-4c1c-a562-0d564250836f} = s '{F39D9D33-85D5-4AAA-9486-347B51B3792D}'
}
}
}
////////////////////////////////////////////////////////////////////////////////
问的地方不是很精确，往斑竹高抬贵手。只是这个问题比较急，跟microsoft联系也是象踢球一样踢来踢去的。有资料的提供点资料。
谢谢！

[kingstar568]

头文件
// CCNewThumbnail

class ATL_NO_VTABLE CCNewThumbnail :
public CComObjectRootEx<CComSingleThreadModel>,
public CComCoClass<CCNewThumbnail, &CLSID_CNewThumbnail>,
public IDispatchImpl<ICNewThumbnail, &IID_ICNewThumbnail, &LIBID_NewThumbnailTestLib, /*wMajor =*/ 1, /*wMinor =*/ 0>,
public IInitializeWithStream,
//public IThumbnailProvider,
public IPreviewHandler
{
public:
CCNewThumbnail()
{
}

DECLARE_REGISTRY_RESOURCEID(IDR_CNEWTHUMBNAIL)


BEGIN_COM_MAP(CCNewThumbnail)
COM_INTERFACE_ENTRY(ICNewThumbnail)
COM_INTERFACE_ENTRY(IDispatch)
COM_INTERFACE_ENTRY(IInitializeWithStream)
//COM_INTERFACE_ENTRY(IThumbnailProvider)
COM_INTERFACE_ENTRY(IPreviewHandler)
END_COM_MAP()



DECLARE_PROTECT_FINAL_CONSTRUCT()

HRESULT FinalConstruct()
{
return S_OK;
}

void FinalRelease()
{
}

public:
STDMETHOD (Initialize) ( IStream *pStream,DWORD grfMode);
//STDMETHOD (GetThumbnail) (UINT cx,HBITMAP *phbmp,WTS_ALPHATYPE *pdwAlpha);

STDMETHOD (DoPreview) (VOID);
STDMETHOD (QueryFocus) (HWND *phwnd);
STDMETHOD (SetFocus) (VOID);
STDMETHOD (SetRect) (const RECT *prc);
STDMETHOD (TranslateAccelerator) (MSG *pmsg) {return E_NOTIMPL;}
STDMETHOD (Unload) (void);
STDMETHOD (SetWindow) (HWND hwnd,const RECT *prc);
};

OBJECT_ENTRY_AUTO(__uuidof(CNewThumbnail), CCNewThumbnail)

[冰宇枫]

up

[crystal_heart]

http://windowssdk.msdn.microsoft.com/en-us/library/aa361575.aspx


There are cases where initialization with streams is not possible. In scenarios where your thumbnail provider does not implement IInitializeWithStream, it must opt out of running in the isolated process where the system indexer places it by default when there is a change to the stream. To opt out of the process isolation feature, set the following registry value.


HKEY_CLASSES_ROOT
CLSID
{66742402-F9B9-11D1-A202-0000F81FEDEE}
DisableProcessIsolation= 1
If you implement IInitializeWithStream and do a stream-based initialization, your provider is more secure and reliable. Typically, disabling process isolation is only intended for legacy handlers; avoid disabling this feature for any new code. IInitializeWithStream should be the first choice whenever possible.

[zjysky]

这是什么东西啊，我怎么没见过

[LinZhongBao]

o

[zhenghaibingood]

xuexi学习

[Bennyatt]

那个。。。。。。

vista 是个啥子东西呀？？

现在开发工具太多了，我都没见过，摸都没摸过。。。

谁让我摸摸呀。。

[icehouse]

up!

[kingsang]

ding

[ccccffff]

不懂

[crystal_heart]

http://windowssdk.msdn.microsoft.com/en-us/library/aa361575.aspx

Registering Your Thumbnail Provider
Registration of a thumbnail provider is based on standard file associations.

The GUID for the thumbnail handler Shell extension is E357FCCD-A995-4576-B01F-234630154E96.


看起来应该是在Shell extension做的东西，不是HKCR/.mm/shellex
Shell extension之前没有做过，你自己找多些资料吧。

Creating Shell Extension Handlers在这里有说明
http://windowssdk.msdn.microsoft.com/en-us/library/ms649575.aspx

[kingstar568]

是的，的确如此。
谢谢你crystal_heart(笑看风云) 的关注跟提供的帮助

[OracleRoob]

接分

[kingstar568]

非常感谢crystal_heart(笑看风云) 提供的资料，我正在试。
马山回来报告结果

[kingstar568]

马山回来报告结果

－－－－－－－－－－
更正： 马上回来报告结果

[_V_]

.........

[lonerdo]

顶

[kingstar568]

上午试了下，还是不行。还是IInitializeWithStream 调不起来

[kingstar568]

问题解决了，我们下了vista RC2的sdk 上面的例子程序可以通过测试了。谢谢各位，下班前揭帖。

[fellowcheng]

解决就好