Window Editor: Getting the correct layout through code

I'm having an issue where I can't place my button in a grid layout. It's my first editor, so it might be something basic that I don't understand.
I've been trying to make it work with GUILayout.BeginHorizontal(); but it just won't work I don't know what I'm doing wrong.

Here's my custom window editor right now, I'd like my buttons to be ordered in a grid layout.
http://i.imgur.com/pLRMWbU.png

Here's the code where I'm drawing my buttons, I call this in the OnGUI() method.

private bool DrawButtonObject(Object obj, string pathStartingFromResourcesFolder, int number)
{
//GUILayout.BeginHorizontal();

bool retVal = false;

var tex = Resources.Load(pathStartingFromResourcesFolder) as Texture2D;

if (tex != null)
retVal = GUILayout.Button(tex, GUILayout.Width(64), GUILayout.Height(64));
else
{
retVal = GUILayout.Button("Select", GUILayout.Width(64f), GUILayout.Height(64f));
}
GUILayout.Label(obj.name, GUILayout.Width(160f));

GUI.color = Color.white;

//GUILayout.EndHorizontal();
return retVal;
}

So how do I go about creating that grid layout with the buttons?

Thanks in advance for any help

 

Ok the solution is using GUILayout.BeginArea(), it will create 1 column of a certain amount of space defined by a rect, so if you want more than 1 column, you have to put it in a for loop with an x offset for each rect.
I've still got to make the scrolling work with that method because it's not working anymore.