Win7拖放：可以查出COleDataObject是否包含shell库吗？
我有一个带有文件和文件夹列表控件的应用程序，支持拖放操作。现在我想让用户能够将 Windows 7 库（例如音乐、图片等）放入此控件中。
在我的放置处理程序中，我有一个COleDataObject，现在我试图找出库是否已放入控件中。由于该对象似乎不包含标准格式（例如 CF_HDROP），因此我使用 COleDataObject::BeginEnumFormats 和 COleDataObject::GetNextFormat枚举数据对象中的格式。我总共得到 5 种不同的 FORMATETC 结构。
以下是各个结构的 FORMATETC.cfFormat 和 FORMATETC.tymed 成员的列表：
- cfFormat = 0xc0a5，tymed = 0x1
- cfFormat = 0xc418，tymed = 0x1
- cfFormat = 0xc410，tymed = 0x1
- cfFormat = 0xc0fd，tymed = 0x4
- cfFormat = 0xc0fc，tymed = 0x1
谁能告诉我其中一个是否指向 shell 库并且如果是这样，我如何能够确定该库的解析名称？这些 cfFormat 值是否记录在某处？
最好的问候，
胡巴冈巴
I have an application with a file and folder list control which supports Drag&Drop operations. Now I would like to make it possible for the user to be able to drop a Windows 7 Library (e.g. Music, Pictures and so on) into this control.
In my drop handler I have a COleDataObject and now I'm trying to find out, if a library has been dropped into the control. Since the object does not seem to contain a standard format (e.g. CF_HDROP), I'm using COleDataObject::BeginEnumFormats and COleDataObject::GetNextFormat to enumerate the formats in the data object. I get a total of 5 different FORMATETC structures.
Here's a list of the FORMATETC.cfFormat and FORMATETC.tymed members of the individual structures:
- cfFormat = 0xc0a5, tymed = 0x1
- cfFormat = 0xc418, tymed = 0x1
- cfFormat = 0xc410, tymed = 0x1
- cfFormat = 0xc0fd, tymed = 0x4
- cfFormat = 0xc0fc, tymed = 0x1
Can anyone tell me if one of them is pointing to a shell library and if so, how I would be able to e.g. determine the parsing name of this library? Are these cfFormat values perhaps documented somewhere?
Best regards,
humbagumba
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这些 MSDN 页面可能会有所帮助：
http://msdn。 microsoft.com/en-us/library/bb776902%28VS.85%29.aspx
http://msdn.microsoft.com/en- us/library/ff729168%28VS.85%29.aspx
他们没有您给出的确切格式值，但这应该是一个开始。
These MSDN pages might help:
http://msdn.microsoft.com/en-us/library/bb776902%28VS.85%29.aspx
http://msdn.microsoft.com/en-us/library/ff729168%28VS.85%29.aspx
They don't have the exact format values you've given, but it should be a start.
使用
SHCreateShellItemArrayFromDataObject()将数据对象转换为IShellItem，您可以使用它来测试它们是否是库。在 MSDN 上了解更多信息。
Use
SHCreateShellItemArrayFromDataObject()to convert the data object intoIShellItems, with which you can test to see if they are libraries.Read more on MSDN.