How do I allow users to resize columns in custom editor windows?

I've been poking around the internet and the Unity site for quite some time now and I just can't seem to find a proper answer or direction to go in. Any help would be appreciated.

Pretty much I have a custom editor window (screenshot above) and sometimes the path gets pretty long and the unique name has that potential as well. I was wondering if there was a way to allow the user to drag and change the column width. My code is pretty much kind of laid out like this:

 GUIStyle styleSelectedAudio = new GUIStyle();
         styleSelectedAudio.normal.background = SetBackground(1, 1, new Color(0.1f, 0.1f, 0.1f, 0.2f));
         GUIStyle styleIncludeToggle = new GUIStyle();
         styleIncludeToggle.padding = new RectOffset(25, 0, 0, 0);
 
         AudioImporter aImporter = AssetImporter.GetAtPath(soundBankList[i].path) as AudioImporter;
 
         if (m_intSelectAudio != soundBankList[i].id)
             EditorGUILayout.BeginHorizontal();
         else
             EditorGUILayout.BeginHorizontal(styleSelectedAudio);
         if (GUILayout.Button("Edit", GUILayout.MinWidth(50.0f), GUILayout.MaxWidth(50.0f)))
         {
             m_intSelectAudio = soundBankList[i].id;
             SoundBankAudioEditor window = (SoundBankAudioEditor)EditorWindow.GetWindow(typeof(SoundBankAudioEditor));
         }
         EditorGUILayout.BeginHorizontal(styleIncludeToggle, GUILayout.MinWidth(70.0f), GUILayout.MaxWidth(70.0f));
         soundBankList[i].include = EditorGUILayout.Toggle(soundBankList[i].include);
         EditorGUILayout.EndHorizontal();
         EditorGUILayout.LabelField(soundBankList[i].id.ToString(), GUILayout.MinWidth(40.0f), GUILayout.MaxWidth(40.0f));
         EditorGUILayout.LabelField(soundBankList[i].length.ToString("F2") + "s", GUILayout.MinWidth(80.0f), GUILayout.MaxWidth(80.0f));
         if (soundBankList[i].uniqueName == null || soundBankList[i].uniqueName == "")
             EditorGUILayout.LabelField("-", GUILayout.MinWidth(200.0f), GUILayout.MaxWidth(200.0f));
         else
             EditorGUILayout.LabelField(soundBankList[i].uniqueName, GUILayout.MinWidth(200.0f), GUILayout.MaxWidth(200.0f));
         EditorGUILayout.LabelField(soundBankList[i].fileName, GUILayout.MinWidth(200.0f), GUILayout.MaxWidth(200.0f));
         EditorGUILayout.LabelField(soundBankList[i].extension, GUILayout.MinWidth(80.0f), GUILayout.MaxWidth(80.0f));
         
       
         EditorGUILayout.LabelField(soundBankList[i].path.ToString(), GUILayout.MinWidth(800.0f), GUILayout.MaxWidth(1000.0f));
         EditorGUILayout.EndHorizontal();