Friends, im new to visual studio, i have Frea 300 with a manual to program visual basic. it is having FRJ_API.dll file. i want to import it as add reference in visual studio 2015. but it is giving me an error " A reference to 'c;\ FRJ_API.dll' could not be added. please make sure that the file is accessible, and that it is a valid assembly or COM component" ... I tried to surf google but not get the solution. The file is attached with this post... i want to access the functions to monitor and control parameters of Freja testing equipment. your help is appreciated.. thanks and regards..
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