c＃如何从表单2上的按钮单击更改表单1中的字符串

I am creating a Zombie Survival RPG Game and I want to make it so when I press a button (The move button from the "MainGame" form) that all the strings from the "Look-Out" form change to whatever I want. (When move button is clicked, the player can see different Items then the last time.)I am creating a Zombie Survival RPG Game and I