It is an EHR product, it may or may not have interfacing capabilities which for new starters is like extracting patient data and creating an HL7 message out of it. You really need first understand the EHR. You can contact the direct support for Vista EHR CPRS tool and ask.
EHR products vary differently some have this as a built in feature some do not and require another tool like Mirth for integration purpose that connects to the same database that this product is on and provide the capacity to interface.
I got this reference from wikipedia which clearly states the use of Mirth
"Tools for CCR/CCD support have been developed for VistA, allowing VistA to communicate with other EHRs using these standardized information exchange protocols.This includes the Mirth open source cross platform HL7 interface and NHIN Connect, the open source health information exchange adaptor."
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