ReadProcessMemory only returning one byte

Hi, I have the following C# code. It's meant to return an Integer, but it only returns 256 at the most.
It appears that I'm missing the next byte.
Does anybody have any ideas?

Thanks

byte[] buffer = new byte[200];
fixed (byte* cptr = &buffer[0])
{
int x = 0;
int* xptr = &x;
IntPtr hProcess = OpenProcess(PROCESS_VM_READ, false, p[0].Id);
bool result = ReadProcessMemory(hProcess, baseAddress, cptr, 8, null);

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