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> Windows > need help regarding rich edit STREAMIN callback function |
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vbVeryBeginner 07 Jan 2006, 04:13
hi,
i can't figure out, why my text wouldn't show in the richedit window using the following code. could somebody please give me some advice. Code: t1 db 'The callback function return...',13,10,0 t2 db 'An EM_AUTOURLDETECT message enables or di...',13,10,0 struct EDITSTREAM dwCookie dd ? dwError dd ? pfnCallback dd ? ends Code:
invoke lstrlen,t1
mov [siSize],eax
mov [chatEs.dwCookie],t2
mov [chatEs.dwError],1
mov [chatEs.pfnCallback],proc_streamin_callback
invoke SendMessage,[ppH],EM_STREAMIN,SF_TEXT,chatEs
and the callback function Code: proc proc_streamin_callback dwCookie,pbBuff,maByte,transByte push ebx esi edi ; the maByte value is 4kb push [siSize] pop [transByte] invoke RtlMoveMemory,[pbBuff],[dwCookie],[transByte] invoke MessageBox,NULL,[pbBuff],f0,MB_OK ; mov eax,0 <- result error if eax = 0 pop edi esi ebx ret endp
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07 Jan 2006, 04:13 |
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vbVeryBeginner 07 Jan 2006, 19:07
hi farrier,
i got this if i mov eax,0 
thats why i commented it out i read that too from PSDK, psdk wrote:
but i don't know which part i am wrong.  |
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07 Jan 2006, 19:07 |
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jdawg 07 Jan 2006, 21:58
When you make a MessageBox, eax is the location of the return value of the button being pushed. Try making a little exception handler for the MessageBox before you return from the procedure. something like this.
Code: proc proc_streamin_callback dwCookie,pbBuff,maByte,transByte push ebx esi edi ; the maByte value is 4kb push [siSize] pop [transByte] invoke RtlMoveMemory,[pbBuff],[dwCookie],[transByte] invoke MessageBox,NULL,[pbBuff],f0,MB_OK cmp eax,ID_OK ;allows you to hold for a button press which will then allow you to write to eax je @f @@: mov eax,0 pop edi esi ebx ret endp |
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07 Jan 2006, 21:58 |
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vbVeryBeginner 07 Jan 2006, 23:20
well, even if i commented the invoke MessageBox, the error still occurs.
Code:
invoke RtlMoveMemory,[pbBuff],[dwCookie],[transByte]
;comment ---- invoke MessageBox,NULL,[pbBuff],f0,MB_OK
mov eax,0 ;<- result error if eax = 0
pop edi esi ebx
actually the MessageBox is a test function to see if i successfully copied the string t2 into pBuff, and it seems the string is copied into the buffer. but it just won't show up in richedit control. Code: cmp eax,ID_OK ;allows you to hold for a button press which will then allow you to write to eax sorry, i couldn't understand wat you mean. |
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07 Jan 2006, 23:20 |
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RedGhost 08 Jan 2006, 03:35
hi, i have this from a very old project, sorry its nasm (before i discovered the magic of fasm xD)
Code: %define cookie ebp+8 %define pbbuf ebp+12 %define cb ebp+16 %define pcb ebp+20 @streaminproc: push ebp mov ebp, esp push ebx push esi push edi push 0 push dword[pcb] push dword[cb] push dword[pbbuf] push dword[cookie] call [ReadFile] xor eax, 1 pop edi pop esi pop ebx mov esp, ebp pop ebp retn 16 ;--- _________________ redghost.ca |
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08 Jan 2006, 03:35 |
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vbVeryBeginner 08 Jan 2006, 04:06
thanks redghost,
that is to use the readfile function to handle to streamin process. wat i wish to attain is just to simply move a string into the rich edit control. i think it should be simple, but somehow, i don't know why, and which part i made mistake. 
ps:i know the SetWindowText :p k, but need to use streamin for some reason. |
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08 Jan 2006, 04:06 |
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farrier 08 Jan 2006, 14:32
vbVeryBeginner,
Well, if you want to do it the easy way: Try EM_REPLACESEL and EM_SETSEL. To add text to the current cursor positon, EM_SETSEL with -1, -1 to unselect all text and EM_REPLACESEL with TRUE, pointer_to_text All my experience has been exactly like RedGhost, using EM_STREAMIN with ReadFile to do printing from an RTF control. hth, farrier _________________ Some Assembly Required It's a good day to code! U.S.Constitution; Bill of Rights; Amendment 1: ... the right of the people peaceably to assemble, ... The code is dark, and full of errors! |
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08 Jan 2006, 14:32 |
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vbVeryBeginner 08 Jan 2006, 23:30
ya farrier, i see that from tomasz's quetannon example too.
but i find it weird, why i can't use the EM_STREAMIN to insert just a sentence of ascii? and when i mov eax,0, the application clashed. but according to psdk, this callback function is not limited on the just readfile and writefile. |
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08 Jan 2006, 23:30 |
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