Hi
I am beginner in Assembly
First of all sorry for my broken English
i m trying to send a string to dll to add another string in dll and return combined string but it does not work
can anybody help me?
test1.asm
.386
.model flat,stdcall
option casemap:none
include \masm32\include\windows.inc
include \masm32\include\kernel32.inc
include \masm32\include\user32.inc
includelib \masm32\lib\kernel32.lib
includelib \masm32\lib\user32.lib
includelib test2.lib
addProc PROTO:DWORD,:DWORD
.data
test1 db "Masm",0
buffer db 30 dup(0)
.code
start:
invoke addProc,addr test1,addr buffer
invoke MessageBox,NULL,addr buffer,0,0
invoke ExitProcess,NULL
end start
test2.asm (dll)
.386
.model flat,stdcall
option casemap:none
include \masm32\include\windows.inc
include \masm32\include\kernel32.inc
include \masm32\include\user32.inc
includelib \masm32\lib\kernel32.lib
includelib \masm32\lib\user32.lib
.data
test2 db "32",0
.code
start:
addProc proc dnm:LPSTR,dnl:LPSTR
invoke lstrcat,dnl,dnm
invoke lstrcat,dnl,addr test2
ret
addProc endp
end start
Quote from: Force
i m trying to send a string to dll to add another string in dll and return combined string but it does not work
What bit is not working, it wouldn't appear you have enough code to make a DLL, or are creating/linking it in a fashion that will work.
http://www.masm32.com/board/index.php?topic=15939.0
my project is here
That is great and all but you don't code a dll the same way you code an exe. Look at: \masm32\examples\exampl01\dll to see the structure
You can allocate a memory and then return it via eax each time your function called.
Quote from: FarabiYou can allocate a memory and then return it via eax each time your function called.
Well that'll work, but is prone to be blamed for the memory leaks that inevitably occur. Much better for the caller to provide a buffer, and sizing.
Quote from: Forcemy project is here
Please revive the tutorial cited in the thread I pointed too, specifcally the DllEntry() part
http://win32assembly.online.fr/tut17.html
That does the job. See in particular the use of labels and end directives.
You need the -lib option, not /dll
.386
.model flat,stdcall
option casemap:none
include \masm32\include\windows.inc
include \masm32\include\kernel32.inc
include \masm32\include\user32.inc
includelib \masm32\lib\kernel32.lib
includelib \masm32\lib\user32.lib
.data
test2 db "32",0
.code
addProc proc dnm:LPSTR,dnl:LPSTR
invoke lstrcat,dnl,dnm
invoke lstrcat,dnl,addr test2
ret
addProc endp
END
Thanks all i will try it again
i tried it in math.
it works good
code is here
Your version chokes if test2.dll is not present. For mine, test2.lib is sufficient, and can be deleted afterwards, i.e. the exe is standalone.
Run-time Dynamic Linking (http://msdn.microsoft.com/en-us/library/windows/desktop/ms685090(v=vs.85).aspx) is a better choice if the DLL may not be present and you need to provide the user with a meaningful error message.
Thanks All for Helping
JJ2007 and MichaelW
you were right
I solved problem with LIB option not DLL
it works now as i want
project is here