SetJob, array's size and marshal.Sizeof

[Cedric]

Hello,
I 'm a bit confused about the size of an array of byte use by getjob or
setjob.

For GetJob no problem, API return size needed BUT for SetJob I must pass an
array with good size. It's seems that API need extra space for storing string.
In the structure all members are integer or IntPtr and Marshal.SizeOf return
a size of 104 but GetJob return size like 1000.

So my question is : If I modify a string that will be used by the API, how
to compute the new array's size needed by SetJob ?

Thanks for help.