Important:
This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.
A version of this page is also available for
4/8/2010

This function unmaps a mapped view of a file from the address space of the calling process.

Syntax 

BOOL UnmapViewOfFile( 
  LPCVOID 
lpBaseAddress 
);

Parameters

lpBaseAddress

[in] Pointer to the base address of the mapped view of a file to be unmapped. This value must be identical to the value returned by a previous call to the MapViewOfFilefunction.

Return Value

Nonzero indicates success. All dirty pages within the specified range are written lazily to disk. Zero indicates failure. To get extended error information, call GetLastError.

Remarks

Although an application can close the file handle used to create a file-mapping object, the system holds the corresponding file open until the last view of the file is unmapped.

Requirements

Header winbase.h
Library coredll.lib
Windows Embedded CE Windows CE 1.01 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also