Read text from TitleBlock in drawing

I'm trying to read some text from TitleBlock in a drawing sheet using VBA. The Problem i'm having is the 'Object not set'. I don't know why it's happening. Having hard time.

Code:

Dim swApp As SldWorks.SldWorks

Sub main()

Set swApp = Application.SldWorks

Dim swDraw As SldWorks.DrawingDoc

Set swDraw = swApp.ActiveDoc

'swDraw.EditTemplate

Dim swSheet As SldWorks.Sheet

Set swSheet = swDraw.GetCurrentSheet()

Dim sheet_name As String

sheet_name = swSheet.GetName()

Dim swTitle As SldWorks.TitleBlock

Set swTitle = swSheet.TitleBlock()

Dim note_count As Integer

'note_count = swTitle.GetNoteCount()         '<<<<<<

Dim vNote As SldWorks.Note

'ReDim vNote(note_count)

Set vNote = swTitle.GetNotes                     '<<<<< Here i am having the problem. The return type is array of notes, even i make it array of note, gives me error.

'Dim i As Integer

'Dim note_name As String

'Dim note_text As String

'For i = 0 To UBound(vNote)

'    Dim swNote As SldWorks.Note

'    Set swNote = vNote(i)

'    note_name = swNote.GetName()

'    note_text = swNote.GetText()

'Next i

End Sub

SolidworksApi macros