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Please, take a look at this:

_MainWndProc_WM_Create:



        push    0

        push    [hInstance]

        push    Edit1ID         (0)

        push    dword [esp+4]

        push    25

        push    200

        push    35

        push    50

        push    050800080h      (010800080h - non-Child)

        push    EditText

        push    EditClassName

        push    0200h

        call    [CreateWindowEx]

        mov     [hEdit1],eax

I've tired of thinking what's wrong with this.
CreateWindowEx always returns NULL :( . It works only when I change ID and Style with values from brackets. Look at the attached file: not a handy interface. :)

I guess the answer is simple, but little mistakes are mush more hard to find than big ones.

Sorry, attach is here.

It seems to me your are trying to create an edit control, thus it should be a child control.

Hmm.. so that means that you should set the style as WS_CHILD. Furthermore, since it is a child control, I do not think it should have a menu so i think EditID should be 0.

Hi, roticv!
If I'm not mistaken, when you create a control the hMenu field becomes an ID of a control. Nevertheless, I tried to push 0 instead of EditID, and it doesn't work.
As for WS_CHILD: 050800080h is the sum of WS_CHILD, WS_VISIBLE, WS_BORDER and ES_AUTOHSCROLL.

Maybe this part of code is not enough. Here is the whole code (a FASM one).

Your offset is wrong using ESP in the push as you have already
modified the stack...

Changing it to something like this should work:

Thanks, Graebel!
Great thanks!
I tried to find the mistake everywhere except this string.
Now everything works fine. :alright: :alright: :alright: