DirectSound header issues

I added the DirectSound header to my C++ application. I compile and I get about 57+ errors. If I remove the header, the errors are gone. Everything looks natural... I included the dsound.lib file as normal. Here's my code...

#define WIN32_LEAN_AND_MEAN

#include <windows.h>
#include <windowsx.h>
#include "winmain.h"
#include <d3d9.h>
#include <dsound.h>
#include <dinput.h>
#include "Common.h"

Errors:
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(230) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(230) : error C2143: syntax error : missing ';' before '*'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(230) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(349) : error C2146: syntax error : missing ';' before identifier 'lpwfxFormat'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(349) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(349) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(365) : error C2146: syntax error : missing ';' before identifier 'lpwfxFormat'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(365) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(365) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(416) : error C2146: syntax error : missing ';' before identifier 'lpwfxFormat'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(416) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(416) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(425) : error C2146: syntax error : missing ';' before identifier 'lpwfxFormat'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(425) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(425) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(686) : error C2061: syntax error : identifier 'LPWAVEFORMATEX'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(696) : error C2061: syntax error : identifier 'LPCWAVEFORMATEX'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(770) : error C2061: syntax error : identifier 'LPWAVEFORMATEX'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(780) : error C2061: syntax error : identifier 'LPCWAVEFORMATEX'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(1041) : error C2061: syntax error : identifier 'LPWAVEFORMATEX'
c:\program files\microsoft directx sdk (february 2006)\include\dsound.h(1099) : error C2061: syntax error : identifier 'LPWAVEFORMATEX'




Why would this happen?