I don't know if this will be usefull or not to anyone but I couldn't
find any good documentation on integrated mapping with MapInfo from C++
that doesn't use MFC. So I wrote up a small wrapper function that returns a
pointer to an instance of MapInfo for doing integrated mapping or just plain
automation. I just needed to pack a bunch of tables but I wanted more
control over some other stuff than MapBasic gives. I didn't actually want to
do any integrated mapping just some batch functions. Anyway here is the
function which I put in a header called "MapInfoPtr.h" and an example of
using it from a quick console app just to make sure it works (created with
VC++6 | tested on Windows 2000 ):
///////header file/////////////////////
#ifndef MAPINFO_PTR_INCLUDED
#define MAPINFO_PTR_INCLUDED
#include "windows.h"
#include <atlbase.h>
#include <atlconv.h>
#include <comutil.h>
#import "C:\\Program Files\\MapInfo\\Professional\\MAPINFOW.TLB"
raw_native_types
using namespace MapInfo;
DMapInfo *GetMapInfoPtr(){
OleInitialize(NULL);
CLSID clsid;
char *pszApp = "MapInfo.Application";
#if WIN32
USES_CONVERSION;
::CLSIDFromProgID(A2W(pszApp), &clsid);
#else
::CLSIDFromProgID(pszApp, &clsid);
#endif
IUnknown *pUnknown=0;
//CLSCTX_ALL
HRESULT
hret=CoCreateInstance(clsid,NULL,CLSCTX_ALL,IID_IUnknown,reinterpret_cast<vo
id**>(&pUnknown));
switch(hret){
case S_OK:
break;
case REGDB_E_CLASSNOTREG:
return 0;
break;
case CLASS_E_NOAGGREGATION:
return 0;
break;
case E_NOINTERFACE:
return 0;
break;
}
DMapInfo *m_MapInfo;
//Query the upper interface for the inner DMapInfo Interface
hret=pUnknown->QueryInterface(__uuidof(DMapInfo),reinterpret_cast<void**>(&m
_MapInfo));
//Release the unknown as soon as we are done with it
pUnknown->Release();
if (FAILED(hret))
{
return 0;
}
return m_MapInfo;
}
#endif
/////// end header file/////////////////////
//////////main console ////////////////////
#include "stdafx.h"
#include "MapInfoPtr.h"
#include <iostream>
int main(int argc, char* argv[])
{
DMapInfo *dMi = GetMapInfoPtr();
if(dMi){
char* szName =
_com_util::ConvertBSTRToString(dMi->GetFullName());
std::cout << szName << "\n";
dMi->Release();
}
OleUninitialize();
system("PAUSE");
return 0;
}
////////////////////////////////////////
I hope that will help anyone still using COM out there as we still do here
where I work.
Andy
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