没人答题，只好散分了。回者给分。改了，今日19:00以前给分(100分)

请帮我说明一下TFormatetc及TstgMedium。英文MSDN看得我似是而非
回帖都给分给分的了

看来楼主英文不是很过关哦...呵呵

我的英语也不是很好^-^||

原文贴上来学习学习

//ActiveX
PFormatEtc = ^TFormatEtc;
{$EXTERNALSYM tagFORMATETC}
tagFORMATETC = record
cfFormat: TClipFormat;
ptd: PDVTargetDevice;
dwAspect: Longint;
lindex: Longint;
tymed: Longint;
end;
TFormatEtc = tagFORMATETC;
{$EXTERNALSYM FORMATETC}
FORMATETC = TFormatEtc;

PStgMedium = ^TStgMedium;
{$EXTERNALSYM tagSTGMEDIUM}
tagSTGMEDIUM = record
tymed: Longint;
case Integer of
0: (hBitmap: HBitmap; unkForRelease: Pointer{IUnknown});
1: (hMetaFilePict: THandle);
2: (hEnhMetaFile: THandle);
3: (hGlobal: HGlobal);
4: (lpszFileName: POleStr);
5: (stm: Pointer{IStream});
6: (stg: Pointer{IStorage});
end;
TStgMedium = tagSTGMEDIUM;
{$EXTERNALSYM STGMEDIUM}
STGMEDIUM = TStgMedium;

我现在正在准备自考英语本科段的考试，LZ贴上原文来看看我能不能搞定它

找个翻译软件来摸索摸索 单词认识了 大概意思也就猜出来了

FORMATETC
The FORMATETC structure is a generalized Clipboard format. It is enhanced to encompass a target device, the aspect or view of the data, and a storage medium indicator. Where one might expect to find a Clipboard format, OLE uses a FORMATETC data structure instead. This structure is used as a parameter in OLE functions and methods that require data format information.

typedef struct tagFORMATETC
{
CLIPFORMAT cfFormat;
DVTARGETDEVICE *ptd;
DWORD dwAspect;
LONG lindex;
DWORD tymed;
}FORMATETC, *LPFORMATETC;

Members
cfFormat
Particular clipboard format of interest. There are three types of formats recognized by OLE:
Standard interchange formats, such as CF_TEXT.
Private application formats understood only by the application offering the format, or by other applications offering similar features.
OLE formats, which are used to create linked or embedded objects.
ptd
Pointer to a DVTARGETDEVICE structure containing information about the target device for which the data is being composed. A NULL value is used whenever the specified data format is independent of the target device or when the caller doesn't care what device is used. In the latter case, if the data requires a target device, the object should pick an appropriate default device (often the display for visual components). Data obtained from an object with a NULL target device, such as most metafiles, is independent of the target device. The resulting data is usually the same as it would be if the user chose the Save As command from the File menu and selected an interchange format.
dwAspect
One of the DVASPECT enumeration constants that indicate how much detail should be contained in the rendering. A single clipboard format can support multiple aspects or views of the object. Most data and presentation transfer and caching methods pass aspect information. For example, a caller might request an object's iconic picture, using the metafile clipboard format to retrieve it. Note that only one DVASPECT value can be used in dwAspect. That is, dwAspect cannot be the result of a BOOLEAN OR operation on several DVASPECT values.
lindex
Part of the aspect when the data must be split across page boundaries. The most common value is -1, which identifies all of the data. For the aspects DVASPECT_THUMBNAIL and DVASPECT_ICON, lindex is ignored.
tymed
One of the TYMED enumeration constants which indicate the type of storage medium used to transfer the object's data. Data can be transferred using whatever medium makes sense for the object. For example, data can be passed using global memory, a disk file, or structured storage objects. For more information, see the TYMED enumeration.
Remarks
The FORMATETC structure is used by methods in the data transfer and presentation interfaces as a parameter specifying the data being transferred. For example, the IDataObject::GetData method uses the FORMATETC structure to indicate exactly what kind of data the caller is requesting.

DVASPECT
The DVASPECT enumeration values specify the desired data or view aspect of the object when drawing or getting data.

typedef enum tagDVASPECT
{
DVASPECT_CONTENT = 1,
DVASPECT_THUMBNAIL = 2,
DVASPECT_ICON = 4,
DVASPECT_DOCPRINT = 8
} DVASPECT;

Elements
DVASPECT_CONTENT
Provides a representation of an object so it can be displayed as an embedded object inside of a container. This value is typically specified for compound document objects. The presentation can be provided for the screen or printer.
DVASPECT_THUMBNAIL
Provides a thumbnail representation of an object so it can be displayed in a browsing tool. The thumbnail is approximately a 120 by 120 pixel, 16-color (recommended) device-independent bitmap potentially wrapped in a metafile.
DVASPECT_ICON
Provides an iconic representation of an object.
DVASPECT_DOCPRINT
Provides a representation of the object on the screen as though it were printed to a printer using the Print command from the File menu. The described data may represent a sequence of pages.
Remarks
Values of this enumeration are used to define the dwAspect field of the FORMATETC structure. Only one DVASPECT value can be used to specify a single presentation aspect in a FORMATETC structure. The FORMATETC structure is used in many OLE functions and interface methods that require information on data presentation.

The default value of MiscStatus is used if a subkey corresponding to the specified DVASPECT is not found. To set an OLE control, specify DVASPECT==1. This will cause the following to occur in the Registry:

HKEY_CLASSES_ROOT/CLSID/ . . ./MiscStatus = 1

TYMED
The TYMED enumeration values indicate the type of storage medium being used in a data transfer. They are used in the STGMEDIUM or FORMATETC structures.

typedef [transmit_as(long)] enum tagTYMED
{
TYMED_HGLOBAL = 1,
TYMED_FILE = 2,
TYMED_ISTREAM = 4,
TYMED_ISTORAGE = 8,
TYMED_GDI = 16,
TYMED_MFPICT = 32,
TYMED_ENHMF = 64,
TYMED_NULL = 0
} TYMED;

Elements
TYMED_HGLOBAL
The storage medium is a global memory handle (HGLOBAL). Allocate the global handle with the GMEM_SHARE flag. If the STGMEDIUM punkForRelease member is NULL, the destination process should use GlobalFree to release the memory.
TYMED_FILE
The storage medium is a disk file identified by a path. If the STGMEDIUM punkForRelease member is NULL, the destination process should use OpenFile to delete the file.
TYMED_ISTREAM
The storage medium is a stream object identified by an IStream pointer. Use ISequentialStream::Read to read the data. If the STGMEDIUM punkForRelease member is NULL, the destination process should use IStream::Release to release the stream component.
TYMED_ISTORAGE
The storage medium is a storage component identified by an IStorage pointer. The data is in the streams and storages contained by this IStorage instance. If the STGMEDIUM punkForRelease member is NULL, the destination process should use IStorage::Release to release the storage component.
TYMED_GDI
The storage medium is a GDI component (HBITMAP). If the STGMEDIUM punkForRelease member is NULL, the destination process should use DeleteObject to delete the bitmap.
TYMED_MFPICT
The storage medium is a metafile (HMETAFILE). Use the Windows or WIN32 functions to access the metafile's data. If the STGMEDIUM punkForRelease member is NULL, the destination process should use DeleteMetaFile to delete the bitmap.
TYMED_ENHMF
The storage medium is an enhanced metafile. If the STGMEDIUM punkForRelease member is NULL, the destination process should use DeleteEnhMetaFile to delete the bitmap.
TYMED_NULL
No data is being passed.
Remarks
During data transfer operations, a storage medium is specified. This medium must be released after the data transfer operation. The provider of the medium indicates its choice of ownership scenarios in the value it provides in the STGMEDIUM structure. A NULL value for the IUNKNOWN field indicates that the receiving body of code owns and can free the medium. A non-NULL pointer specifies that ReleaseStgMedium can always be called to free the medium.

to 々飞翔鸟々
正因为全都看的是大致意思，所以才似是而非，哈哈，E文是差了点，重要的一点老是隐约感觉到自己理解的有偏差

to AmuroFU
做起来是有点费力的。权当练习了

全翻太费劲了

ding

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排队

晕，人均GDP不高了啊~~~

[8D]

呵呵