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UpdateResource info  Overview  Group

The UpdateResource function adds, deletes, or replaces a resource in an executable file.

BOOL UpdateResource(

    HANDLE hUpdate,

// update-file handle

    LPCTSTR lpType,

// address of resource type to update

    LPCTSTR lpName,

// address of resource name to update

    WORD wLanguage,

// language identifier of resource

    LPVOID lpData,

// address of resource data

    DWORD cbData 

// length of resource data, in bytes

   );

Parameters

hUpdate
Specifies an update-file handle. This handle is returned by the BeginUpdateResource function.
lpType
Points to a null-terminated string specifying the resource type to be updated. This parameter can also be an integer value passed to the MAKEINTRESOURCE macro, or it can be one of the following predefined resource types:

Value

Meaning

RT_ACCELERATOR

Accelerator table

RT_ANICURSOR

Animated cursor

RT_ANIICON

Animated icon

RT_BITMAP

Bitmap resource

RT_CURSOR

Hardware-dependent cursor resource

RT_DIALOG

Dialog box

RT_FONT

Font resource

RT_FONTDIR

Font directory resource

RT_GROUP_CURSOR

Hardware-independent cursor resource

RT_GROUP_ICON

Hardware-independent icon resource

RT_ICON

Hardware-dependent icon resource

RT_MENU

Menu resource

RT_MESSAGETABLE

Message-table entry

RT_RCDATA

Application-defined resource (raw data)

RT_STRING

String-table entry

RT_VERSION

Version resource

lpName
Points to a null-terminated string specifying the name of the resource to be updated. This parameter can also be an integer value passed to the MAKEINTRESOURCE macro.
wLanguage
Specifies the language identifier of the resource to be updated. For a list of the primary language identifiers and sublanguage identifiers that make up a language identifier, see the MAKELANGID macro
lpData
Points to the resource data to be inserted into the executable file. If the resource is one of the predefined types, the data must be valid and properly aligned. Note that this is the raw binary data stored in the executable file, not the data provided by LoadIcon, LoadString, or other resource-specific load functions. All data containing strings or text must be in Unicode format; lpData must not point to ANSI data.

If lpData is NULL, the specified resource is deleted from the executable file.

cbData
Specifies the size, in bytes, of the resource data at lpData.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

An application can use UpdateResource repeatedly to make changes to the resource data. Each call to UpdateResource contributes to an internal list of additions, deletions, and replacements but does not actually write the data to the executable file. The application must use the EndUpdateResource function to write the accumulated changes to the executable file.

See Also

BeginUpdateResource, EndUpdateResource, LoadIcon, LoadString, LockResource, MAKEINTRESOURCE, MAKELANGID, SizeofResource

See also:


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