compiler error in MS visual studio 2010 - visual-studio

Question

I am compiling my C source code in MS visual Studio C++ 2010.I am getting following following errors while building. What can be the reasons for it?
C:\Program Files\Microsoft Visual Studio 10.0\VC\include\sys/time.h(18): error C2061: syntax error : identifier 'suseconds_t'
C:\Program Files\Microsoft Visual Studio 10.0\VC\include\sys/time.h(19): error C2059: syntax error : '}'
C:\Program Files\Microsoft Visual Studio 10.0\VC\include\sys/time.h(37): error C2079: 'it_interval' uses undefined struct 'timeval'
C:\Program Files\Microsoft Visual Studio 10.0\VC\include\sys/time.h(38): error C2079: 'it_value' uses undefined struct 'timeval'
[EDIT ]
Following is the code in my program:
#ifndef _DWORD_DEFINED
#define _DWORD_DEFINED
typedef unsigned long DWORD;
#endif
int getTime(struct timeval * tp, void * tzp)
{
DWORD milliseconds;
milliseconds = timeGetTime();
tp->tv_sec = milliseconds / 1000;
tp->tv_usec = (milliseconds % 1000) * 1000;
return 0;
}

Answer 1

Without any code, all I can say is this:
The first error cause is this.
The second error cause is this.
The third and fourth error cause is this.
Edit: After the OP's edit, the errors are more than obvious. Look at the struct timeval.
Where is it's definition? You access members of that struct and still you there is no visible definition of the struct.