[Lazarus] Library, Threads and Gui

[SteveG]

I understand that the gui system is non-reentrant, and therefore should 
not be accessed by any thread but the main one.

I am using cmem as my memory manager for both my app and library (if 
thats relevant), and it would appear that the entrant thread of the 
library is the same as the main app ?

So.... is it safe to read / write to gui components (I have the control 
addresses) from within the library (no new threads created) without 
problems ?

To summarise - can I rd/wr to form controls from within a cmem 
controlled library using its main thread ?

Thanks - SteveG