Question

I would like to allocate space (dynamic size) with a byte array and get a pointer to the “spacearea” and free it later if I don’t need it anymore.

I know about VirtualAlloc, VirutalAllocEx and LocalAlloc.
Which one is the best and how can I free the memory afterwards?

Thank you for your help.

Answer 1

I don’t think it is a good idea to use the winapi for that instead of the native Pascal functions.

You can simply define an array of bytes as

var yourarray: array of byte;

then it can be allocated by

setlength(yourarray, yoursize);

and freed by

setlength(yourarray, 0);

Such an array is reference counted and you can access individual bytes as yourarray[byteid]

Or if you really want pointers, you can use:

var p: pointer;

GetMem(p, yoursize);

FreeMem(p);