Need code to merge PDF files in a folder using adobe acrobat X

[rockybalboa]

Thanks for the code but i am getting this error under Sub MergePDFs query (Dim a As Variant, i As Long, n As Long, ni As Long, p As String
Dim AcroApp As New Acrobat.AcroApp, PartDocs() As Acrobat.CAcroPDDoc)
.
Compile error: User-defined type not defined