Open an Inventor dwg file and run the following macro.
Public Sub InsertAutoCADBlockOnSheet()
' Set a reference to the drawing document.
' This assumes a drawing document is active.
Dim oDrawDoc As DrawingDocument
Set oDrawDoc = ThisApplication.ActiveDocument
' Obtain a reference to the desired AutoCAD block definition.
Dim oBlockDef As AutoCADBlockDefinition
Set oBlockDef = oDrawDoc.AutoCADBlockDefinitions.Item("Filled-1")
Dim oSheet As Sheet
Set oSheet = oDrawDoc.ActiveSheet
' If the definition contains prompted string inputs...
'Dim sPromptStrings(1) As String
'sPromptStrings(0) = "String 1"
'sPromptStrings(1) = "String 2"
Dim oTG As TransientGeometry
Set oTG = ThisApplication.TransientGeometry
' Add an instance of the block definition to the sheet.
' Rotate the instance by 45 degrees and scale by .75 when adding.
' The symbol will be inserted at (10,10) on the sheet.
Dim oAutoCADBlock As AutoCADBlock
Set oAutoCADBlock = oSheet.AutoCADBlocks.Add(oBlockDef, oTG.CreatePoint2d(10, 10), (3.14159 / 4), 0.75)
End Sub