Help with splicing


I need help splicing two different meshes. I have a cylinder to start with and then I have created a closed curve separately. I then used ALT-C to convert the curve to a mesh. I now want to splice this new mesh (that was the curve) into the cylinder. The problem I am having is that I cannot seem to have both objects as active so I can start splicing them together. Any idea’s? I would appreciate the help. Thank you.


I would maybe join the new mesh curve with the cylinder with ctrl-j and then in edit mode I could begin joining them.