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Application.GUIDFromString Method

Office 2007
The GUIDFromString function converts a string to a GUID, which is an array of type Byte.

Syntax

expression.GUIDFromString(String)

expression   A variable that represents an Application object.

Parameters

NameRequired/OptionalData TypeDescription
StringRequiredVariantA string expression which evaluates to a GUID in string form.

Return Value
Variant

Remarks

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.

Example

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.

Visual Basic for Applications
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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