Jump to content
Sign in to follow this  

Reading buffer fill on dll

Recommended Posts



I need to read a buffer that is fill when I call a dll. This is the code:

$buff = DllStructCreate("char[260]")

$Data = DllStructCreate("ptr pchar;uint bufsize")

$handle = DllCall("buffer.dll","int","FillBuffer","ptr",DllStructGetPtr($Data))

The question is that I don't known how read the buffer.

I tried with:

$Buff1 = DllStructGetData($Data,1)

But when I see it on a msgbox I see only an hexadecimal number (a memory position I guess).

Anyone can help me?

Edited by gczobel

Share this post

Link to post
Share on other sites

What is mean to in there? As far as I can tell $Data is a struct full of pointers. Do you want to use "$buff" anywhere?

What is "FillBuffer" mean to do?

Post your code because code says more then your words can. SciTe Debug mode - it's magic: #AutoIt3Wrapper_run_debug_mode=Y. Use Opt("MustDeclareVars", 1)[topic="84960"]Brett F's Learning To Script with AutoIt V3[/topic][topic="21048"]Valuater's AutoIt 1-2-3, Class... is now in Session[/topic]Contribution: [topic="87994"]Get SVN Rev Number[/topic], [topic="93527"]Control Handle under mouse[/topic], [topic="91966"]A Presentation using AutoIt[/topic], [topic="112756"]Log ConsoleWrite output in Scite[/topic]

Share this post

Link to post
Share on other sites

You get pointer to some string.

Try this:

$tData = DllStructCreate("ptr pchar;uint bufsize")

DllCall("buffer.dll", "int", "FillBuffer", "ptr", DllStructGetPtr($Data))

$tBuff = DllStructGetData($Data, "pchar")
$tSize = DllStructGetData($tData, "bufsize")

$tString = DllStructCreate("char[" & DllStructGetData($tSize) & "]", DllStructGetPtr($tBuff))
$sString = DllStructGetData($tString, 1)

If bufsize member doesn't include null terminator you can add +1 when sizing string buffer to make the string null-terminated (that's important sometimes)




Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this