Playtime :P
The main features are implemented: Loading, editing, navigation and saving. Let me know if it works on your machine.
There will be two ways to create it:
if 0
Recall "FatTable.tab", some$(), tab
GuiControl MyData, "table", y500, h500, some$()
else
GuiControl MyData, "table", y500, h500, "FatTable.tab"
endif
The first one assumes that you have already a two-dimensional array, so you pass it as some$().
The second one simply passed a filename.
Confused source, exe and two other files attached. Extract to a folder and launch the exe.