CLIENT.CPP

// =========================================================================== 
// File: C L I E N T . C P P 
//  
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF 
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO 
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A 
// PARTICULAR PURPOSE. 
// 
//  This is the client-portion of the OLE impersonation sample. This 
// application uses the CLSID_CObject class implemented by the OLEIMP.CPP 
// module. Pass the machine-name to instantiate the object on, or pass no 
// arguments to instantiate the object on the same machine. See the README.TXT 
// file for further details. 
//  
// This sample may be compiled as either UNICODE or ANSI. 
//  
// Copyright 1996 Microsoft Corporation.  All Rights Reserved. 
// =========================================================================== 
 
// %%Includes: --------------------------------------------------------------- 
#define INC_OLE2 
#include <stdio.h> 
#include <windows.h> 
#include <initguid.h> 
#include <tchar.h> 
#include <conio.h> 
 
// %%GUIDs: ------------------------------------------------------------------ 
DEFINE_GUID(CLSID_CObject, 0x35b79d1, 0xd6d3, 0x11cf, 0xb9, 0xd4, 0x0, 0xaa, 0x0, 0xa2, 0x16, 0xe0); 
 
// --------------------------------------------------------------------------- 
// %%Function: Message 
//  
//  Formats and displays a message to the console. 
// --------------------------------------------------------------------------- 
 void 
Message(LPTSTR szPrefix, HRESULT hr) 
{ 
    LPTSTR   szMessage; 
 
    if (hr == S_OK) 
        { 
        _tprintf(szPrefix); 
        _tprintf(TEXT("\n")); 
        return; 
        } 
  
    if (HRESULT_FACILITY(hr) == FACILITY_WINDOWS) 
        hr = HRESULT_CODE(hr); 
  
    FormatMessage( 
        FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM, 
        NULL, 
        hr, 
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), //The user default language 
        (LPTSTR)&szMessage, 
        0, 
        NULL ); 
 
    _tprintf (TEXT("%s: %s(%lx)\n"), szPrefix, szMessage, hr); 
     
    LocalFree(szMessage); 
}  // Message 
 
// --------------------------------------------------------------------------- 
// %%Function: main 
// --------------------------------------------------------------------------- 
 void __cdecl 
main(int argc, CHAR **argv) 
{ 
    HRESULT hr; 
    COSERVERINFO csi, *pcsi=NULL; 
    WCHAR wsz [MAX_PATH]; 
LPCLASSFACTORY pcf = NULL; 
 
    // initialize COM for free-threaded use 
    hr = CoInitializeEx(NULL, COINIT_MULTITHREADED); 
    if (FAILED(hr)) 
        { 
        Message(TEXT("Client: CoInitializeEx"), hr); 
        exit(hr); 
        } 
 
// initialize the security layer 
hr = CoInitializeSecurity ( 
NULL, 
-1, 
NULL, 
NULL, 
RPC_C_AUTHN_LEVEL_CONNECT, 
RPC_C_IMP_LEVEL_IMPERSONATE, 
NULL, 
0, 
NULL); 
if (FAILED(hr)) 
{ 
Message(TEXT("Client: CoInitializeSecurity"), hr); 
exit(hr); 
} 
 
    // allow a machine-name as the command-line argument 
    if (argc > 1) 
        { 
        MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, argv[1], -1, 
            wsz, MAX_PATH); 
memset (&csi, 0, sizeof (csi)); 
        csi.pwszName = wsz; 
        pcsi = &csi; 
        }  
 
// get the class factory for CObject on the argv[1] machine 
hr = CoGetClassObject (CLSID_CObject, CLSCTX_SERVER, pcsi, 
IID_IClassFactory, (LPVOID*)&pcf); 
if (FAILED(hr)) 
Message(TEXT("Client: CoGetClassObject"), hr); 
else 
{ 
        LPUNKNOWN   punk = NULL; 
 
    // create a remote instance of the object 
    Message(TEXT("Client: Creating Instance..."), S_OK); 
    hr = pcf->CreateInstance(NULL, IID_IUnknown, (LPVOID*)&punk); 
    if (FAILED(hr)) 
        Message(TEXT("Client: CoCreateInstanceEx"), hr); 
    else 
        { 
// wait until the user wants us to release the object 
Message(TEXT("Client: Press any key to release object..."), S_OK); 
getch(); 
 
        // let go of the object 
        punk->Release(); 
        } 
pcf->Release(); 
} 
    CoUninitialize(); 
    Message(TEXT("Client: Done"), S_OK); 
}  // main 
 
// EOF =======================================================================