Get a Structure Property Value from XMP

Demonstrates how to open a JPG or TIF image file, access the XMP metadata, and fetch the value of a structure property, such as the Iptc4xmpCore:CiTelWork (found within the Iptc4xmpCore:CreatorContactInfo structure).

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Dim xmp As New Chilkat.Xmp()

Dim success As Boolean

success = xmp.UnlockComponent("Anything for 30-day trial.")
If (success <> true) Then
    MsgBox(xmp.LastErrorText)
    Exit Sub
End If


'  Load a JPG or TIF image file.
'  Sample JPG's with XMP metadata may be found at:
'  http://www.chilkatsoft.com/testData/xmp/sample1.jpg
'  http://www.chilkatsoft.com/testData/xmp/sample2.jpg
'  http://www.chilkatsoft.com/testData/xmp/sample3.jpg
success = xmp.LoadAppFile("sample1.jpg")
If (success <> true) Then
    MsgBox(xmp.LastErrorText)
    Exit Sub
End If


TextBox1.Text = TextBox1.Text & "Num embedded XMP docs: " _
     & xmp.NumEmbedded & vbCrLf

'  Assuming there is at least one, get the 1st.
'  (There is typically never more than one, but theoretically it's possible.)
Dim xml As Chilkat.Xml
xml = xmp.GetEmbedded(0)
If (Not (xml Is Nothing )) Then

    Dim propVal As String
    propVal = xmp.GetStructValue(xml,"Iptc4xmpCore:CreatorContactInfo","Iptc4xmpCore:CiTelWork")
    If (propVal = vbNullString ) Then
        MsgBox("Not found.")
    Else
        MsgBox(propVal)
    End If




Else
    MsgBox(xmp.LastErrorText)
End If