Copy clipboard contents to string - vbscript

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VBScript

clipboard

In vbscript I am initally copying contents from pdf to clipboard.
And then copying clipboard contents onto a string.
The code works perfect on a windows7 machine with UFT version 12.53 , Adobe Acrobat DC reader version 15.1536.

However the same script fails at "Copy from clipboard to string" in a windows10 machine with UFT version 14, Adobe Acrobat reader version 18.2304

I am not sure if it is the version conflict that is blocking the script from executing.

What I have tried:

Script :
Function ReadPDF(Filename)
'Call KillByName("AcroRd32.exe") '''Added by Krupesh
Set oShell = CreateObject("wscript.shell")
'Open the PDF file
oShell.run Filename
wait(4)
Window("AdobePdf").Activate
wait 3
'' Select all data from PDF file using 'Control + a ' keys
oShell.Sendkeys "^a"
wait(2)
'' Move data from PDF file to clipboard using 'Control + c ' keys
oShell.Sendkeys "^c"
wait(15)
'Fetching data from clipboard
Set objClipboard = CreateObject("htmlfile")
strClipboard = objClipboard.ParentWindow.ClipboardData.GetData("Text")
'Close the PDF File
'Call terminateProcess("AcroRd32.exe")
'Return the value of clipboard data
wait 4
ReadPDF= strClipboard
wait 3
End Function