c# - OPOS and Microsoft .NET, unable to run sample application -


how can fix error?

enter image description here

source test application

am missing something?

the error seems caused missing information in registry resolve interface library control pos device.
these com libraries have setup program takes care of needed registration.
in lack of this, try register manually libraries 

regsvr32 libraryname.dll

where, in place of libraryname.dll, write effective name of yours dll.
, remember on deployment machines.

of course, pointed jamiehennerley in answer, platform target of application should match same bitness of library


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