Passing C++ classes across DCOM

/////////////////////////////////////////////////////////////////
//                                                             //
//           Usefull helper functions                          //
//-------------------------------------------------------------//
//                                                             //
//             By Eugene Khodakovsky                           //
//                  June, 2000                                 //
//             ekhodakovsky@yahoo.com                          //
/////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include <fstream.h>
#include "SLUtil.h"


// C:/WINDOWS
const CString GetWindowsDirectory()
{
	TCHAR	path[MAX_PATH] = {0};
	::GetWindowsDirectory(path,sizeof(path)/sizeof(TCHAR));
	return CString(path);
}

// C:/WINDOWS/SYSTEM
const CString GetSystemDirectory()
{
	TCHAR	path[MAX_PATH] = {0};
	::GetSystemDirectory(path,sizeof(path)/sizeof(TCHAR));
	return CString(path);
}

const CString GetUserName()
{
	TCHAR	name[MAX_PATH] = {0};
	DWORD	nSize = sizeof(name)/sizeof(TCHAR);
	::GetUserName(name,&nSize);
	return CString(name);
}

const CString GetComputerName()
{
	TCHAR	name[MAX_PATH] = {0};
	DWORD	nSize = sizeof(name)/sizeof(TCHAR);
	::GetComputerName(name,&nSize);
	return CString(name);
}

// C
const CString GetSystemDrive()
{
	CString	strPath;
	strPath = GetSystemDirectory();
	int idx = strPath.Find(':');
	ATLASSERT(idx != 0);
	if(idx != 0)
	{
		strPath = strPath.Left(idx);
	}
	return strPath;
}

//////////////////////////////////////////////////////////////////////////////
// CComBSTR
CComBSTR operator+(CComBSTR& v1,CComBSTR& v2)
{
	CComBSTR bstr = v1; bstr += v2; return bstr;
}
CComBSTR operator+(CString v1,CComBSTR& v2)
{
	CComBSTR bstr = v1; bstr += v2; return bstr;
}
CComBSTR operator+(LPCSTR v1,CComBSTR& v2)
{
	CComBSTR bstr = v1; bstr += v2; return bstr;
}
CComBSTR operator+(CComBSTR& v1,LPCSTR v2)
{
	CComBSTR bstr = v1; bstr += v2; return bstr;
}
CComBSTR operator+(CComBSTR& v1,CString v2)
{
	CComBSTR bstr = v1; bstr += CComBSTR(v2); return bstr;
}

//////////////////////////////////////////////////////////////////////////////
// GUID helper

void ProgIDFromCLSID(const CLSID& clsid,CComBSTR& comBSTR)
{
	LPOLESTR bstr;
	::ProgIDFromCLSID (clsid,&bstr);
	comBSTR = CString(bstr);
	CoTaskMemFree(bstr);
}
void StringFromCLSID(const CLSID& clsid,CComBSTR& comBSTR)
{
	LPOLESTR bstr;
	::StringFromCLSID (clsid,&bstr);
	comBSTR = CString(bstr);
	CoTaskMemFree(bstr);
}
void StringFromIID(const CLSID& clsid,CComBSTR& comBSTR)
{
	LPOLESTR bstr;
	::StringFromIID (clsid,&bstr);
	comBSTR = CString(bstr);
	CoTaskMemFree(bstr);
}
void CLSIDFromString(CComBSTR& comBSTR,CLSID& clsid)
{
	LPOLESTR bstr;
	comBSTR.CopyTo(&bstr);
	::CLSIDFromString(bstr,&clsid);
	::SysFreeString(bstr);
}

void IIDFromString(CComBSTR& comBSTR,CLSID& clsid)
{
	LPOLESTR bstr;
	comBSTR.CopyTo(&bstr);
	::IIDFromString(bstr,&clsid);
	::SysFreeString(bstr);
}
void CLSIDFromProgID(CComBSTR& comBSTR,CLSID& clsid)
{
	LPOLESTR bstr;
	comBSTR.CopyTo(&bstr);
	::CLSIDFromProgID(bstr,&clsid);
	::SysFreeString(bstr);
}

//////////////////////////////////////////////////////////////////////////////
// Notepad

void ShowInNotepad(const CString& strText)
{
	CString strPathName = GetSystemDrive() + _T(":/Temp/SLText.txt");
	ofstream file(strPathName);
	CString str(strText); 
	str.Replace('\r',' ');
	file << str;
	file.close();
	::WinExec("notepad.exe " + strPathName,true);
}

void ShowInNotepad(const CComBSTR& bstrText)
{
	CString strText = bstrText;
	ShowInNotepad(strText);
}

//////////////////////////////////////////////////////////////////////////////
// String Tokenaizer

CString GetNextToken(CString& strSrc, const CString strDelim)
{
	CString token;
	int idx = strSrc.FindOneOf(strDelim);
	if(idx != -1)
	{
		token  = strSrc.Left(idx);
		strSrc = strSrc.Right(strSrc.GetLength() - (idx + 1) );
	}
	else
	{
		token = strSrc;
		strSrc.Empty();
	}
	return token;
}