Alright, this is a bit of a bugger, but it has to be done this way to avoid bloated code. I am reading a file into memory that was written in 16bit DOS. Due to this, variable sizes do not match. This means that a 64bit long is much larger than the 16bit long stored in the data in memory. How can I take the four-byte long in memory and read it into an eight-byte long on my 64bit system? I need a method that is fairly quick since I'll be reading various data into various variables semi-frequently and I can't have pausing while it reads the old data into a new variable.