[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | Reference for unit 'sysutils' (#rtl)

# CreateGUID

Create a new GUID

## Declaration

Source position: sysutilh.inc line 185

`function CreateGUID(`
`out GUID: TGUID`
`):Integer;`

## Description

CreateGUID can be called to create a new GUID (Globally Unique Identifier) value. The function returns the new GUID value in GUID and returns zero in case the GUID was created succesfully. If no GUID was created, a nonzero error code is returned.

The default mechanism for creating a new GUID is system dependent. If operating system support is available, it is used. If none is available, a default implementation using random numbers is used.

The OnCreateGUID callback can be set to hook a custom mechanism behind the CreateGUID function. This can be used to lt the GUID be created by an external GUID creation library.

## Errors

On error, a nonzero return value is returned.

## See also

CreateGUID |  | Create a new GUID

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