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Open Big Picture mode without opening a new Steam process

Description
This script will open Steam Big Picture mode in the currently running Steam process.
Language
C#.net
Minimum Version
Created By
orlando2b56913
Contributors
-
Date Created
Aug 29, 2023
Date Last Modified
Aug 29, 2023

Scripted Function (Macro) Code

using System;
using System.Drawing;

// The 'windowHandle' parameter will contain the window handle for the:
//   - Active window when run by hotkey
//   - Trigger target when run by a Trigger rule
//   - TitleBar Button owner when run by a TitleBar Button
//   - Jump List owner when run from a Taskbar Jump List
//   - Currently focused window if none of these match
public static class DisplayFusionFunction
{
	public static void Run(IntPtr windowHandle)
	{
		// Open STEAM's Big Picture mode
		BFS.Application.Start("C:\\Program Files (x86)\\Steam\\steam.exe", "steam://open/bigpicture");
		
		//To leave that mode, just use:
		//BFS.Application.Start("C:\\Program Files (x86)\\Steam\\steam.exe", "steam://close/bigpicture");
	}
}