How to convert a structure to byte*

Question

While trying to convert my structure to byte* :

objNDSDriver.StartFn((byte*)objSTNDSFTPDriverInfo);

I am getting the error:

error C2440: 'type cast' : cannot convert from 'STNDSFTPDriverInfo' to 'byte *'

It would behoove you to obtain a [good introductory C++ book](http://stackoverflow.com/questions/388242/the-definitive-c++-book-guide-and-list). — James McNellis, Dec 25 '10 at 08:52
Is `STNDSFTPDriverInfo` a pointer type or is it a structure/class? — JUST MY correct OPINION, Dec 25 '10 at 08:52

score 2 · Answer 1 · answered Dec 25 '10 at 08:55

2

Try this

objNDSDriver.StartFn((byte*)&objSTNDSFTPDriverInfo);

answered Dec 25 '10 at 08:55

DReJ

Frédéric Hamidi · Accepted Answer · 2011-01-05T00:49:50.287

2

You should take the address of your structure, and probably use the reinterpret_cast operator:

objNDSDriver.StartFn(reinterpret_cast<byte *>(&objSTNDSFTPDriverInfo));

edited Jan 05 '11 at 00:49

answered Dec 25 '10 at 08:55

Frédéric Hamidi

Thanks , Itz working now, But Why the refernce is typecasted not the obj itself? I just want to know as I am startin up with C – Simsons Dec 25 '10 at 08:58
@Subhen, since you want to treat `objSTNDSFTPDriverInfo` as an array of bytes, its *address* should be cast, not its value. – Frédéric Hamidi Dec 25 '10 at 09:03
& in this case means the address. And there is no reference in C, so you mean C++. – Nikko Dec 25 '10 at 09:43

2 Answers2