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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