Write to a listbox in another form

Question

Good stack.

I am developing a small application for automatic backup of Mysql and SQL Server databases. The application is to be made in Windows Forms + C#.

I thought to implement something similar to a "console", being actually a listbox that will save the logs. My idea was to be able to store the logs inside this listbox. For example:

14:22:34 - Vou começar a backup a base de dados: user_control
14:23:10 - Terminei o backup de: user_control C:/backups

Now on to the question. How can I send class content to this listbox? I have multiple classes and multiple forms, but I always send to a single local.

I tried to create a post in the same listbox form and send arguments there. The function would take it and put it in the listbox. But I can’t call by the function without creating a new instance.

Such function. It is Form1.cs

public void addLog(string content) {
        ConsoleLog.Items.Add(content);
    }

An example of what I’ve been trying to do. It’s in frmAdd.Cs

addLog("Olá mundo");

I don’t know if I explained myself clearly, I’m willing to share more ways.