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iin a window (not child) i`ve created an edit box.
This window is not a dialog but an ordinary window.
But when I`m trying save the typed text with GetDlgItemText, WinXP kicks me out.
...
...
WndProc21 proc hWin  :DWORD,uMsg:DWORD,wParam :DWORD,lParam :DWORD ;this is the background window
LOCAL ...; variables

  .if uMsg == WM_COMMAND ;from parent ch2
          .if wParam == sEdit
            .if edit21flag==0 ; not to create twice
            invoke CreateWindowEx,WS_EX_LEFT, ADDR EditClassName,NULL,\
                            WS_CHILD  or ES_MULTILINE or ES_LEFT or\
                                  ES_AUTOHSCROLL or WS_HSCROLL or WS_VSCROLL,5,5,485,185,\
                                  hWin,EditID,hInstance,NULL    ; create edit box, works fine
                mov  edit21flag,1                   
        mov  hEdit,eax
invoke SetWindowLong,hEdit,GWL_WNDPROC,addr EditWndProc
  mov OldWndProc,eax  ; sublassing OK
        invoke ShowWindow,hEdit,SW_SHOWNORMAL
            invoke SetFocus, hEdit
            .endif ;edit21flag==0
          .endif ;wParam == sEdit

  .endif ;

  .if uMsg == WM_CREATE
invoke LoadBitmap,hInstance,IDB_MYB21
mov hBitmapch21,eax                    ;window hatterkep
      invoke GetWindowLongA,hWin,GWL_EXSTYLE  ;**********; alpha blend begin
      or eax,WS_EX_LAYERED
      invoke SetWindowLongA,hWin,GWL_EXSTYLE,eax
      invoke GetModuleHandleA,addr User32
      invoke GetProcAddress,eax,addr SLWA
      mov pSLWA,eax
      push LMA_ALPHA ; only set alpha value
      push 80      ; alpha value
      push 0
      push hWin
      call pSLWA                              ;**********; alpha blend end

  .elseif uMsg == WM_CHAR
        mov eax,wParam
        invoke dwtoa,eax,ADDR buffer3
        invoke MessageBox,NULL,ADDR buffer3,SADD("wmchar,ch21:"),MB_OK


  .elseif uMsg == WM_PAINT ;
invoke BeginPaint,hChild21,addr ps ;ez a resz egy bitmap-et rak ki hatternek, OK.
  mov hdc,eax
invoke CreateCompatibleDC,hdc
mov hMemoryDC2ch00,eax
invoke SelectObject,hMemoryDC2ch00,hBitmapch21
mov hOldBmp2ch00,eax
invoke GetObject,hBitmapch21,sizeof BITMAP,addr bitmap2ch00
invoke StretchBlt,hdc,0,0,500,200,hMemoryDC2ch00,0,0,bitmap2ch00.bmWidth,bitmap2ch00.bmHeight,SRCCOPY
invoke SelectObject,hMemoryDC2ch00,hOldBmp2ch00

invoke DeleteDC,hMemoryDC2ch00
            invoke EndPaint,hChild21,addr ps ;
   
  .endif
        invoke DefWindowProc,hWin,uMsg,wParam,lParam
    ret
WndProc21 endp
;------------------------------
EditWndProc PROC hEdit21:DWORD,uMsg:DWORD,wParam:DWORD,lParam:DWORD ; subclass
.if uMsg==WM_CHAR
mov eax,wParam
.if eax!=0 && eax!=27
invoke CallWindowProc,OldWndProc,hEdit21,uMsg,eax,lParam
ret    ; returns OK
.elseif eax==27
    invoke GetDlgItemText,hEdit21,EditID,edit21buf,255d  ; and here it fais regardless what handle i`m gining to it
                                                                                                  ;
            ;invoke SetFocus,hChild21
                  ;invoke ShowWindow,hEdit21,SW_HIDE
                  ret
.else
invoke CallWindowProc,OldWndProc,hEdit21,uMsg,wParam,lParam
ret
.endif
.endif
 
xor eax,eax
ret
EditWndProc endp

Also the Handle passed to GetDlgItemText is supposed to be the dialogs handle. Since in your case there is no Dialog you should probably send a WM_GETTEXT message straight to the edit control.

And it seems I should try gettext ...
you win too :)
thanks