> To set a Breakpoint in SICE with GetDlgItemTextA doesn't work

Sure. U haven't A or W in 16-bit proggy. See Import for suggestions.

> Are there any other APIs to read a EditField

a lot. SendMessage, hmemcopy etc. See above.

> Also, I had the proggy disasm with W32DSM89.EXE to look at the string refs. But there are nothing ----> no strings refs :-(
> But, if I take a look to the ASCII dump, I see many string refs !

I think, you need use the IDA, not WDasm. Also play with any
good 16-bits ResourceEditor (Borland ResWorkShop, ExeScope).

What about URL of this proggy ? If it is not too big, I'll be like
to see it, before to say smth else.