hello,

i am wondering how you would load a library into an exe. example, if i wanted to add some code to popup a message box into a simple hello world application, and i need to import the user32.dll, how would i do that.

with the api LoadLibraryA load the dll and with GetProcAddress you have the adress of any api of this library in your machine.

look WINAPIS32 is the help of the apis.

Ricardo Narvaja

when i use GetProcAddress, where does the address get stored so that i can use it?

thanks

please grab a copy of win32.hlp
or downlaod platform sdk from microsoft
and go through them it will clearly state what will be returned

now where it returns is dependent on how you see it i believe

for example a line of hll program may look like this

if (ret = GetProcAddress( *dll ,*proc) !=0)
{
call ret (args);
do blah;
return success;
}
else {
get lost;
}
return iamlost;

now the same would be looking like this is asm
invoke GetProcAddres, ADDR name_of_dll, ADDR name_of_proc
mov return,eax

push args
call [return]

now if you are looking and coding under debugger
you can do like below

push addr
push addr
call GetprocAddress
push args
call eax

please look into winhlp
code some simple programs
run them under debugger get your self familiarized with
what return where and how

and btw i am not discouraging you but in this forum you cant expect
answers to questions like your because this forum is meant for questions
regarding ollydbg its usage its problems its plugins etc

try to visit win32asmboard if you are interested in coding in assembly
or may be read through forgers winprog tuts if you prefer
high level syntax

ps edit
i re read your original question
by a simple hello world program you mean you are coding with c or c++
and building it as console version ?? (a console version means it displays
the string in the black box called dos)
then you will have some more compatibility problems like
putting together gui code along side of cui
gui == graphical user interface
cui == console user interface

ok thanks.

why would it matter if its being in dos or not, because if im loading that library and calling code from there then would it really matter?

i know all about windows api and stuff, i was wondering where does the value returned from GetProcAddress go in asm? cause its not like one can use variables at the debugging level..