Add missing declarations

Author: amtopel

include/MAPIUtil.h

@@ -846,6 +846,30 @@ HrIStorageFromStream (LPUNKNOWN lpUnkIn,
 STDAPI_(SCODE)			ScInitMapiUtil(ULONG ulFlags);
 STDAPI_(VOID)			DeinitMapiUtil(VOID);
 
+struct RTF_WCSINFO
+{
+	ULONG size;
+	ULONG ulFlags;
+	ULONG ulInCodePage;
+	ULONG ulOutCodePage;
+};
+
+struct RTF_WCSRETINFO
+{
+	ULONG size;
+	ULONG ulStreamFlags;
+};
+
+// Declaration missing from headers
+STDAPI_(HRESULT) OpenStreamOnFileW(LPALLOCATEBUFFER lpAllocateBuffer, LPFREEBUFFER lpFreeBuffer,
+	ULONG ulFlags, LPWSTR lpszFileName, LPWSTR lpszPrefix, LPSTREAM FAR* lppStream);
+
+STDAPI_(HRESULT) WrapCompressedRTFStreamEx(LPSTREAM pCompressedRTFStream, const RTF_WCSINFO* pWCSInfo,
+	LPSTREAM* ppUncompressedRTFStream, RTF_WCSRETINFO* pRetInfo);
+
+#define MAPI_NATIVE_BODY 0x00010000
+#define pidExchangeXmitReservedMin 0x3FE0
+#define PR_INTERNET_CPID PROP_TAG(PT_LONG, pidExchangeXmitReservedMin - 0x02)
 
 /*
  *	Entry point names.