TehSL

Thanks, that's pretty much exactly what I was looking for!

That's true. However, when the user opens the GUI and the value has already been changed, how can I synchronise the client in that case?

Hello, I'm looking to create a toggle-button in a GuiContainer. The idea can be explained as: - the user opens the GUI of the container, there is a button labeled 'no' there - the user clicks on the button, the client sends a packet to the server to set a boolean to true on the server-side - the server would send a packet back, so the GUI would set the button's label to 'yes' (e.g. think of a 'Machine Enabled' button that can be 'yes' or 'no', perhaps). Also, if a player opened the GUI, the server would have to update the button with the updated value. I already have the button click sending a packet to the server (using SimpleNetworkWrapper), but how can I keep the client updated with the value? I was intending to send the packet back, but how can I access the GUI from within the messagehandler? Or, is there a better way that I should be using instead to send an update to the GUI? Thank you in advance, I appreciate any pointers that I can receive for this.