如何在Form1上创建一个标签，从form2中说出“Hello”？

That's it. It's a dumb dumb (embarrassing!) question, but I've never used C# before, only C++ and I can't seem to figure out how to access a Label on my main form from a secondary form and change the text. If anybody can let me know real quick what to do I'd be so grateful!That's it. It's a dumb dumb (embarrassing!) que