给一个类添加连接点时报错,啥原因?
类视图中右键选择一个类名称,选择“Implement Connection Point…”,弹出“warning”警告框,提示:Unable to find a type library for this project. Click OK to choose from available type libraries To select an interface from this project, cancel this operation and first compile the .idl file.
啥原因,如何解决?