"Adobe Reader -- Faxing a pdf document

Question

"Adobe Reader --
  Faxing a pdf document

My Dot net(C#) based application sends fax messages. I am using FAXCOMLIB.DLL version=1.0.0.0 (Microsoft's dll used for faxing) and runtime version=v1.1.4322 for sending the fax message. When the application attaches a PDF Document and sends the Fax message, an Adobe Acrobat reader instance gets opened in a minimized state.This happens whenever the application sends a fax message with PDF Document attached, a new instance of Acrobat reader gets opened everytime (in a minimized state) and neither of them closes on completion of sending the Fax message. I have to close all those opened instances of Acrobat Reader manually. This however does not happen while faxing Microsoft word documents.

If someone can suggest a workaround for this, please advice. "