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Memory and the Clipboard

A memory object that is to be placed on the clipboard should be allocated by using the GlobalAlloc function with the GMEM_DDESHARE and GMEM_MOVEABLE flags.

Once a memory object is placed on the clipboard, ownership of that memory handle is transferred to the system. When the clipboard is emptied and the memory object has one of the following clipboard formats, the system frees the memory object by calling the indicated Win32 function:

Function called to free object
Clipboard format
DeleteMetaFile
CF_DSPENHMETAFILE

CF_DSPMETAFILEPICT

CF_ENHMETAFILE

CF_METAFILEPICT
DeleteObject
CF_BITMAP

CF_DSPBITMAP

CF_PALETTE
GlobalFree
CF_DIB

CF_DSPTEXT

CF_OEMTEXT

CF_TEXT

CF_UNICODETEXT

When the clipboard is emptied of a memory object whose clipboard format is not shown in the preceding list, the application itself must free the memory object.

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