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Application.GUIDFromString Method (Access)

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

expression .GUIDFromString(String)

expression A variable that represents an Application object.

Parameters

Name

Required/Optional

Data Type

Description

String

Required

Variant

A string expression which evaluates to a GUID in string form.

Return Value

Variant

The Microsoft Access 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 to a GUID, use the GUIDFromString function.

The following example uses the GUIDFromString function to convert a string to a GUID. The string is a GUID stored in string form in a replicated Employees table. The field, s_GUID, is a hidden field added to every replicated table in a replicated database.

Sub CheckGUIDType() 
 
 Dim dbsConn As ADODB.Connection 
 Dim rstEmployees As ADODB.Recordset 
 
 ' Make a connection to the current database. 
 Set dbsConn = Application.CurrentProject.Connection 
 Set rstEmployees = New ADODB.Recordset 
 rstEmployees.Open "Employees", dbsConn, , , adCmdTable 
 
 ' Print the GUID to the immediate window. 
 Debug.Print rst!s_GUID 
 Debug.Print TypeName(rst!s_GUID) 
 Debug.Print TypeName(GuidFromString(rst!s_GUID)) 
 
 Set rstEmployees = Nothing 
 Set dbsConn = Nothing 
 
End Sub
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