John Snow John Snow - 3 months ago 29
C++ Question

syntax error : missing ';' before identifier 'PVOID64' when compiling winnt.h

I've recently got the source-code on a application. When im trying to build the solution, I get an error in all parts where

winnt.h
is included. The error codes differs a bit, but they always point to these lines in winnt.h:

typedef void *PVOID;
typedef void * POINTER_64 PVOID64;


and

struct {
DWORD crc;
BYTE rgbReserved[14];
} CRC;


So, what could be the cause of this? winnt.h is a standard header and has not been modified. Does it has something to do with me using VS 2010, or me using 64-bit windows? or is it some sort of configuration which is needed?

EDIT:
Here's the exact error-codes:

1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(290): error C2146: syntax error : missing ';' before identifier 'PVOID64'
1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(290): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(8992): error C2146: syntax error : missing ';' before identifier 'Buffer'
1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(8992): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(8992): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(11525): error C2059: syntax error : 'constant'
1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(11525): error C2238: unexpected token(s) preceding ';'
1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(11556): error C2059: syntax error : 'constant'
1>C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\winnt.h(11556): error C2238: unexpected token(s) preceding ';'

Answer

You need to include windows.h rather than winnt.h. When you include windows.h it will, in turn, include winnt.h. You need to do it this way for the necessary macros to be in place that are needed to compile winnt.h.

In this case, POINTER_64 is defined in BaseTsd.h like this:

#define POINTER_64 __ptr64

But if you include winnt.h before including windows.h then POINTER_64 is not defined.