uSTGMEDIUM structure (objidl.h)
Represents a generalized global memory handle used for data transfer operations by the IAdviseSink, IDataObject, and IOleCache interfaces.
Syntax
typedef struct tagSTGMEDIUM {
DWORD tymed;
union {
HBITMAP hBitmap;
HMETAFILEPICT hMetaFilePict;
HENHMETAFILE hEnhMetaFile;
HGLOBAL hGlobal;
LPOLESTR lpszFileName;
IStream *pstm;
IStorage *pstg;
} DUMMYUNIONNAME;
IUnknown *pUnkForRelease;
} uSTGMEDIUM;
Members
tymed
The type of storage medium. The marshaling and unmarshaling routines use this value to determine which union member was used. This value must be one of the elements of the TYMED enumeration.
DUMMYUNIONNAME
Handle, string, or interface pointer that the receiving process can use to access the data being transferred. If tymed is TYMED_NULL, the union member is undefined; otherwise, it is one of the following values.
DUMMYUNIONNAME.hBitmap
Bitmap handle. The tymed member is TYMED_GDI.
DUMMYUNIONNAME.hMetaFilePict
Metafile handle. The tymed member is TYMED_MFPICT.
DUMMYUNIONNAME.hEnhMetaFile
Enhanced metafile handle. The tymed member is TYMED_ENHMF.
DUMMYUNIONNAME.hGlobal
Global memory handle. The tymed member is TYMED_HGLOBAL.
DUMMYUNIONNAME.lpszFileName
Pointer to the path of a disk file that contains the data. The tymed member is TYMED_FILE.
DUMMYUNIONNAME.pstm
Pointer to an IStream interface. The tymed member is TYMED_ISTREAM.
DUMMYUNIONNAME.pstg
Pointer to an IStorage interface. The tymed member is TYMED_ISTORAGE.
pUnkForRelease
Pointer to an interface instance that allows the sending process to control the way the storage is released when the receiving process calls the ReleaseStgMedium function. If pUnkForRelease is NULL, ReleaseStgMedium uses default procedures to release the storage; otherwise, ReleaseStgMedium uses the specified IUnknown interface.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 10 Build 20348 |
| Minimum supported server | Windows 10 Build 20348 |
| Header | objidl.h |