Is it possible to change the background color of many screen at the same time?

It's working!! Thank you!!

One last question, It's possible to change the background color of many screen at the same time?

For exemple:

Screen("....").BackColor = HMIRuntime.Math.RGB(255,255,0,255) // The ("...") it suposse to be the path to all screen or the hierarchy

OR

Screen.FindItem("../Screen_1").BackColor = HMIRuntime.Math.RGB(255,255,0,255);

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Split from Switch the color of screens with a script.