UnMapAndLoad function (imagehlp.h)

Article
02/22/2024

Deallocate all resources that are allocated by a previous call to the MapAndLoad function.

Syntax

BOOL IMAGEAPI UnMapAndLoad(
  [in] PLOADED_IMAGE LoadedImage
);

Parameters

[in] LoadedImage

A pointer to a LOADED_IMAGE structure. This structure is obtained through a call to the MapAndLoad function.

Return value

If the function succeeds, the return value is TRUE.

If the function fails, the return value is FALSE. To retrieve extended error information, call GetLastError.

Remarks

The UnMapAndLoad function must be used to deallocate all resources that are allocated by a previous call to MapAndLoad. This function also writes a new checksum value into the image before the file is closed. This ensures that if a file is changed, it can be successfully loaded by the system loader.

All ImageHlp functions, such as this one, are single threaded. Therefore, calls from more than one thread to this function will likely result in unexpected behavior or memory corruption. To avoid this, you must synchronize all concurrent calls from more than one thread to this function.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	imagehlp.h
Library	Imagehlp.lib
DLL	Imagehlp.dll