Edit Box / Threads

I am having a problem updating text to an edit box from a thread. I can obtain all my variable values that i need just cannot print/display them to the edit box.

I have done the following:
Used the UpdateData(FALSE) function ---> didn't work
and used the following statement as well to refrence the function

((CInterface3270Dlg*) AfxGetApp()->m_pMainWnd)->UpdateData(FALSE); ---> didn't work

I have read the MFC info on using Cwnd handling but don't understand it.

Class/Struct Variable (CWnd::FromHandle(*(HWND*)PHWNDView));

Anyone who has any suggestion or even a solution it would be greatly appreatiated.
Thank in advanced