Correct way to use ZeroMemory.

Which way is the correct way to handle this.

TCHAR szString[100];

1. ZeroMemory(&szString, sizeof(szString));

2. ZeroMemory(&szString, sizeof(TCHAR) * sizeof(szString));

3. Something else all together.

ZeroMemory(szString, sizeof(TCHAR) * sizeof(szString));

The size should be expressed in bytes, so to be correct you should use sizeof(), though a char only takes one byte.

szString is basically a pointer, so you don't get it's adress using &.

>ZeroMemory(szString, sizeof(TCHAR) * sizeof(szString));<


Say we had a unicode array -

TCHAR t[255];


sizeof(TCHAR) would equal 2.
sizeof(t) would equal 510.

Using the above method you'd be zero-ing 1020 bytes. This isn't what you want.

The sizeof operator will produce the number of bytes in an array. All you need is -

ZeroMemory(szString,sizeof(szString));

My favorite way...if using C++


TCHAR szString[100] = {0};