Request to add some missing declarations

[amtopel]

Hi, I'm new to pull requests, but I was hoping to have the following declarations added to the MAPI headers:

struct RTF_WCSINFO
{
	ULONG size;
	ULONG ulFlags;
	ULONG ulInCodePage;
	ULONG ulOutCodePage;
};

struct RTF_WCSRETINFO
{
	ULONG size;
	ULONG ulStreamFlags;
};

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)

[amtopel]

@microsoft-github-policy-service agree

@microsoft-github-policy-service agree