Incorrect type on Railgun Structs?

[Meatballs1]

The following structs describe a ULONG_PTR for the buffer sizes, but these appear to be DWORDs from the naming convention, and also are cast as DWORDs in the railgun code ? e.g. railgun.c:530 (I may be confused though (DWORD *)&blah is too much for my simple mind to contemplate). If it is a pointer than maybe the name should be changed?

25 typedef struct _RAILGUN_INPUT 
26 { 
27  const char * cpDllName; 
28  const char * cpFuncName; 
29  const char * cpCallConv; 
30  BYTE * pBufferIN; 
31  BYTE * pBufferINOUT; 
32  ULONG_PTR dwBufferSizeIN; 
33  ULONG_PTR dwBufferSizeOUT; 
34  ULONG_PTR dwBufferSizeINOUT; 
35  Tlv pStackDescriptorTlv; 
36 } RAILGUN_INPUT; 
37 

38 typedef struct _RAILGUN_OUTPUT 
39 { 
40  DWORD dwLastError; 
41  QWORD qwReturnValue; 
42  const char * pErrMsg; 
43  BYTE * pBufferOUT; 
44  BYTE * pBufferINOUT; 
45  ULONG_PTR dwBufferSizeOUT; 
46  ULONG_PTR dwBufferSizeINOUT; 
47 } RAILGUN_OUTPUT;