How can I increase memory security in Delphi?

Question

Is it possible to \"wipe\" strings in Delphi? Let me explain:

I am writing an application that will include a DLL to authorise users. It will read an encrypted file

Answer 1

DLLs don't own allocated memory, processes do. The memory allocated by your specific process will be discarded once the process terminates, whether the DLL hangs around (because it is in use by another process) or not.