Grasshopper .. how to import from rhino some object .. for example a curve to grasshopper

how can I put from rhino some object … for example a curve to grasshopper ?

I’m a beginner … but this is so a fundamental thing and a can’t find something like this ?

is there a function in rhino … like export to grasshopper … than this objekt could change to a special object with which you can work with in grasshopper an return a result ? Choosing if you want to make the input visible or the output from grasshopper ?

When you want to import a curve from rhino to grasshopper you should use curve parameter in grasshopper, right click on parameter and choose set one curve then select your curve in rhino. If you want your curve to be saved in grasshopper independent of rhino,right cluck on parameter and click internalise data.