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Index > Windows > create window for "RichEdit20A" problem

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vbVeryBeginner



Joined: 15 Aug 2004
Posts: 884
Location: \\world\asia\malaysia
vbVeryBeginner
hi,
this should be simple, but i just can't figure out why the rich edit cannot be created?

Code:
section '.data' data readable writeable
  ctlDllNameRe2   db 'riched20.dll',0
       ctlClsNameEdit  db 'EDIT',0
       ctlClsNameRe2   db 'RichEdit20A',0
    


library had been successfully loaded
Code:
invoke       LoadLibrary,ctlDllNameRe2
    


in the WM_CREATE message part
Code:
wmCREATE:
              invoke  CreateWindowEx,WS_EX_CLIENTEDGE,ctlClsNameEdit,NULL,\
                      WS_VISIBLE or WS_CHILD or ES_MULTILINE or WS_VSCROLL or WS_HSCROLL,\
                       CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,\
                  [hWnd],100,[insH],0
                 cmp  eax,NULL
                       jne  @f
             invoke  MessageBox,NULL,wndTitle,wndTitle,MB_OK
             @@:
                     mov  [re2H],eax
             invoke  CreateWindowEx,WS_EX_CLIENTEDGE,ctlClsNameRe2,NULL,\
                       WS_VISIBLE or WS_CHILD or ES_MULTILINE or WS_VSCROLL or WS_HSCROLL,\
                       CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,\
                  [hWnd],101,[insH],0
                 cmp  eax,NULL
                       jne  @f
             invoke  MessageBox,NULL,wndClsName,wndClsName,MB_OK
         @@:
                     jmp  wmBYE
    


the ordinary EDIT control could be created and no message pop up for wndTitle, but message pop up for the wndClsName which notifies that NULL was returned for the ctlClsNameRe2!

did i miss anything? or ... ? i think it is weird.
Post 03 Nov 2004, 03:24
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vbVeryBeginner



Joined: 15 Aug 2004
Posts: 884
Location: \\world\asia\malaysia
vbVeryBeginner
hi,
i found the solution but it looks quite weird and i don't know why!

Code:
        invoke  LoadLibrary,ctlDllNameRe2 ; --------------------> Line A
 invoke  CreateWindowEx,0,\
         wndClsName,wndTitle,\
              WS_OVERLAPPEDWINDOW + WS_VISIBLE,\
         CW_USEDEFAULT,CW_USEDEFAULT,400,240,\
              NULL,NULL,[insH],NULL
               mov  [wndH],eax
     invoke  LoadLibrary,ctlDllNameRe2 ; --------------------> Line B

window_message_loop_start:
....
    


ideally, the api LoadLibrary whether invoke from Line A or Line B should work as expected because the return value is NOT NULL but somehow, if we invoke LoadLibrary after we invoke CreateWindowEx, the below code then won't work! CreateWindowEx would return NULL.

Code:
wmCREATE:
              invoke  LoadLibrary,ctlDllNameRe2 ; --------------------> Line C
         invoke  CreateWindowEx,WS_EX_CLIENTEDGE,ctlClsNameRe2,0,\
                  WS_CHILD + WS_VISIBLE + ES_MULTILINE + WS_VSCROLL + WS_HSCROLL,\
                   0,0,0,0,\
                  [hWnd],200,[insH],0
                 cmp  eax,NULL
                       jne  @f
             invoke  MessageBox,NULL,wndTitle,wndTitle,MB_OK
             @@:
                     mov  [re2H],eax
                     jmp  wmBYE

    


Line A and Line C would works as expected but not Line B
maybe it is a bug on my windows 95?
Post 03 Nov 2004, 07:41
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
well, this is the feel of true windows coding - you do it other way than showed in M$ examples and it doesn't work even if it should due to documentation. It is even bigger fun with directX.
Post 03 Nov 2004, 09:42
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
Quote:
well, this is the feel of true windows coding - you do it other way than showed in M$ examples and it doesn't work even if it should due to documentation.


Vid is very accurate on this: I spent several hours working to get my Win32 console programs working under all versions of Windows, only to discover that the documentation and the implementation details don't always match up Sad They don't make life easy for us assembly programmers.
Post 03 Nov 2004, 12:10
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vbVeryBeginner



Joined: 15 Aug 2004
Posts: 884
Location: \\world\asia\malaysia
vbVeryBeginner
maybe there should be a site contained information on weird windows api! if it is weird, i guess it should be bug :p
Post 04 Nov 2004, 03:19
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