Fix an issue where it can't get the process name or executable path because of a permission issue

src/FocusVolumeControl/AudioHelper.cs

@@ -1,9 +1,11 @@
-using FocusVolumeControl.AudioSessions;
+using BarRaider.SdTools;
+using FocusVolumeControl.AudioSessions;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using System.Runtime.InteropServices;
+using System.Text;
 
 namespace FocusVolumeControl;
 
@@ -55,21 +57,7 @@ public class AudioHelper
 				//but we want all matching sessions so things like discord work right
 				if (index < currentIndex)
 				{
-					try
-					{
-						var displayName = audioProcess.MainModule.FileVersionInfo.FileDescription;
-						if (string.IsNullOrEmpty(displayName))
-						{
-							displayName = audioProcess.ProcessName;
-						}
-						results.DisplayName = displayName;
-					}
-					catch
-					{
-						results.DisplayName = audioProcess.ProcessName;
-					}
-
-					results.ExecutablePath = audioProcess.MainModule.FileName;
+					(results.DisplayName, results.ExecutablePath) = GetInfo(audioProcess);
 
 					currentIndex = index;
 				}
@@ -83,6 +71,60 @@ public class AudioHelper
 		return results.Any() ? results : null;
 	}
 
+	(string name, string path) GetInfo(Process process)
+	{
+		try
+		{
+			var module = process.MainModule;
+			var displayName = module.FileVersionInfo.FileDescription;
+			if (string.IsNullOrEmpty(displayName))
+			{
+				displayName = process.ProcessName;
+			}
+
+			var executablePath = module.FileName;
+
+			return (displayName, executablePath);
+		}
+		catch
+		{
+			return (process.ProcessName, GetExecutablePathBackup(process));
+		}
+	}
+
+	string GetExecutablePathBackup(Process process)
+	{
+		try
+		{
+			string pathToExe = string.Empty;
+
+			if (process != null)
+			{
+				//use query limited information handle instead of process.handle to prevent permission errors
+				var handle = Native.OpenProcess(0x00001000, false, process.Id);
+
+				var buffer = new StringBuilder(1024);
+				var bufferSize = (uint)buffer.Capacity + 1;
+				var success = Native.QueryFullProcessImageName(handle, 0, buffer, ref bufferSize);
+
+				if (success)
+				{
+					return buffer.ToString();
+				}
+				else
+				{
+					var error = Marshal.GetLastWin32Error();
+					Logger.Instance.LogMessage(TracingLevel.ERROR, $"Error = {error} getting process name");
+					return "";
+				}
+			}
+		}
+		catch
+		{
+		}
+		return "";
+	}
+
 
 	public IAudioSession GetActiveSession(FallbackBehavior fallbackBehavior)
 	{

src/FocusVolumeControl/Native.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Runtime.InteropServices;
+using System.Text;
 
 namespace FocusVolumeControl;
 
@@ -59,4 +60,11 @@ public class Native
 	[DllImport("ntdll.dll")]
 	public static extern int NtQueryInformationProcess(IntPtr processHandle, int processInformationClass, ref ParentProcessUtilities processInformation, int processInformationLength, out int returnLength);
 
+
+	[DllImport("Kernel32.dll")]
+	public static extern bool QueryFullProcessImageName(IntPtr hProcess, uint flags, StringBuilder buffer, ref uint bufferSize);
+
+	[DllImport("kernel32.dll")]
+	public static extern IntPtr OpenProcess(uint processAccess, bool inheritHandle, int processId);
+
 }