chapter9_enumclient.cpp

ATL开发指南PDF格式

//
// Chapter9_EnumClient.cpp 
//

#include <windows.h>
#include <tchar.h>
#include <iostream.h>

// Include component category support
#include <comcat.h>

// Include basic ATL support for its conversion macros
#include <atlbase.h>

// Include support for our basic EnumServer
#include "..\Chapter9_EnumServer\Chapter9_EnumServer_i.c"
#include "..\Chapter9_EnumServer\Chapter9_EnumServer.h"


int main(int argc, char* argv[])
{
   cout << "Initializing COM" << endl;

   if ( FAILED( CoInitialize( NULL )))
   {
      cout << "Unable to initialize COM" << endl;
      return -1;
   }

//#define COMPCAT_CLIENT
#ifdef COMPCAT_CLIENT
   HRESULT hr;
   ICatInformation* pci = 0;
   hr = CoCreateInstance( CLSID_StdComponentCategoriesMgr, 
                          NULL,
                          CLSCTX_INPROC_SERVER,
                          IID_ICatInformation,
                          (void**) &pci );

   CATID catidImpl[1];
   catidImpl[0] = CATID_Control;
   IEnumCLSID* pEnum = 0;
   hr = pci->EnumClassesOfCategories( 1,
                                 catidImpl,
                                 0, 0, 
                                 &pEnum );

   // Spin through the list and add them to the listbox
   GUID guids[1];
   ULONG ulNum;
   hr = pEnum->Next( 1, guids, &ulNum );
   while(  hr == S_OK )
   {
      // Look up the ProgID
      WCHAR* pProgID = 0;
      ProgIDFromCLSID( guids[0], &pProgID );

      WCHAR* pCLSIDString = 0;
      StringFromCLSID( guids[0], &pCLSIDString );

      // Display controls ProgID and CLSID
      USES_CONVERSION;
      cout << W2A( pProgID ) << " - " << W2A( pCLSIDString ) <<endl;

      // Free up any memory
      CoTaskMemFree( pProgID );
      CoTaskMemFree( pCLSIDString );

      hr = pEnum->Next( 1, guids, &ulNum );
   }


   // Release the interface pointers
   pEnum->Release();
   pci->Release();

#else

   HRESULT hr;
   IBasicEnum* pbe = 0;
   hr = CoCreateInstance( CLSID_BasicEnum, 
                          NULL,
                          CLSCTX_INPROC_SERVER,
                          IID_IBasicEnum,
                          (void**) &pbe );

   IEnumString* pEnum = 0;
   hr = pbe->get_Enum( &pEnum );
   if ( SUCCEEDED( hr ))
   {
      LPOLESTR string[1];
      ULONG ulNum;
      hr = pEnum->Next( 1, string, &ulNum );
      while(  hr == S_OK )
      {
         // Display string
         USES_CONVERSION;
         cout << W2A( string[0] ) << endl;

         hr = pEnum->Next( 1, string, &ulNum );
      }

      pEnum->Release();
   }

   pbe->Release();

#endif

   CoUninitialize();
   return 0;
}