I have done this. Indeed, I have received errors...
compiling...
internal.c
C:\Program Files\OriginLab\OriginPro70\OriginC\system\graph.h(1720) :Error, class/struct not found:
C:\Program Files\OriginLab\OriginPro70\OriginC\system\graph.h(1720) :Error, data type declaration error
C:\Program Files\OriginLab\OriginPro70\OriginC\system\Wksheet.h(22) :Error, include file compilation error
C:\Program Files\OriginLab\OriginPro70\OriginC\system\data.h(25) :Error, include file compilation error
C:\Program Files\OriginLab\OriginPro70\OriginC\SYSTEM\internal.c(21) :Error, include file compilation error
I will try to reinstall.
Thank you.
Ivan