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StringFromGUID Function [Access 2003 VBA Language Reference]

Office 2003

The StringFromGUID function converts a GUID, which is an array of type Byte, to a string.

StringFromGUID(guid)

The StringFromGUID function has the following argument.

Argument Description
guid An array of Byte data used to uniquely identify an application, component, or item of data to the operating system.

Remarks

The Microsoft Jet database engine stores GUIDs as arrays of type Byte. However, Microsoft Access can't return Byte data from a control on a form or report. In order to return the value of a GUID from a control, you must convert it to a string. To convert a GUID to a string, use the StringFromGUID function. To convert a string back to a GUID, use the GUIDFromString function.

For example, you may need to refer to a field that contains a GUID when using database replication. To return the value of a control on a form bound to a field that contains a GUID, use the StringFromGUID function to convert the GUID to a string.

Note that in order to bind a control to the s_GUID field of a replicated table, you must select the System objects check box on the View tab of the Options dialog box (Tools menu).

Example

The following example returns the value of the s_GUID control on an Employees form in string form and assigns it to a string variable. The s_GUID control is bound to the s_GUID field, one of the system fields added to each replicated table in a replicated database.

Public Sub StringValueOfGUID()

    Dim ctl As Control
    Dim strGUID As String

    ' Get the GUID.
    Set ctl = Forms!Employees!s_GUID
    Debug.Print TypeName(ctl.Value)

    ' Convert the GUID to a string.
    strGUID = StringFromGUID(ctl.Value)
    Debug.Print TypeName(strGUID)

End Sub
		




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