Очистить переменную в оперативной памяти

If you want to erase a variable, that no other program can read it out of the memory anymore, just use this function:

ZeroMemory(Addr(yourVar), SizeOf(yourVar));
ZeroMemory(Addr(yourStr), Length(yourStr));
// ZeroMemory(Address of the variable, Size of the variable); 

Very usefull, if you asked for a password and you want, that nobody other can get it.

Взято с сайта: https://www.swissdelphicenter.ch