ontrols how the members of a structure are packed into memory and specifies the same packing for all structures in a module.

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/Zp[1|2|4|8|16]

When you specify this option, each structure member after the first is stored on either the size of the member type or n-byte boundaries (where n is 1, 2, 4, 8, or 16), whichever is smaller.

The available values are described in the following table.

1 Packs structures on 1-byte boundaries. Same as /Zp.

2 Packs structures on 2-byte boundaries.

4 Packs structures on 4-byte boundaries.

8 Packs structures on 8-byte boundaries (default).

16 Packs structures on 16-byte boundaries.

You should not use this option unless you have specific alignment requirements.