OMG, that function is exactly what I need.
Unfortunately, i got yet another Compiler Error, this time from LTRuntime.h:

Line 81: 'realloc' undeclared identifier

LFProtocolBody **temp = (LFProtocolBody **)realloc(bag->bodys, (bag->bodyCount + 1) * sizeof(LFProtocolBody*));

Uhm, thats strange because it actually should include the window.h header file which includes the realloc function prototype. Three questions:
Can you compile the examples like arrays.c?
What Gamestudio version do you use?
Does the LFBase.h header look like this (the first three actual lines)?

The first three lines are exactly like that.
My gamestudio version is 7.02
Arrays.c gave me that same error:

Line 81: 'realloc' undeclared identifier

Ah, okay, the problem is your Gamestudio version, its too old. You should update it, in case that its not an Warez version, or otherwise you should switch to the A8 free version.

Mine is the Development Version. Can i upgrade to the A8 version ?
Cause i believe i tried upgrading once and I got two versions of GameStudio.
A non-working A7 and a free version A8

But if upgrading to A8 will help me finish my project than i guess I have no choice...

You can download this update for A7 and just install it over your existing version: http://server.conitec.net/down/gstudio7_setup.exe

Then you should apply this patch here which fixes some bugs with the version:
http://server.conitec.net/down/gstudio7_patch.zip

Afterwards, everything should work just fine

No need to update or buy A8 ?

Nope, your A7 should work just fine together with Lite Foundation (I haven't tested it, but the compiler didn't changed much between the later A7 and the earliest A8)

Great. The update is still downloading.
I'll see if it works and post back. Thanks for all the help

It didn't work.
I installed the update and the patch, and now i've got a trial version, and instead of just the error i had prior to the update and the patch, i've recieved about 2 compiler errors, and 3 others during gameplay.

I think i prefer my old version >.> at the cost of LF