_com_ptr_t::CreateInstance

Microsoft Specific

HRESULT CreateInstance( const CLSID& rclsid, IUnknown* pOuter=NULL, DWORD dwClsContext = CLSCTX_ALL ) throw( );

HRESULT CreateInstance( LPOLESTR clsidString, IUnknown* pOuter=NULL, DWORD dwClsContext = CLSCTX_ALL ) throw( );

HRESULT CreateInstance( LPCSTR clsidStringA, IUnknown* pOuter=NULL, DWORD dwClsContext = CLSCTX_ALL ) throw( );

Parameters

rclsid

the CLSID of an object

clsidString

a Unicode string that holds either a CLSID (starting with “{“) or a ProgID

clsidStringA

a multibyte string that holds either a CLSID (starting with “{“) or a ProgID

dwClsContext

context for running executable code

pOuter

the outer unknown for aggregation

Remarks

Creates a new running instance of an object given a CLSID or ProgID. These member functions call CoCreateInstance to create a new COM object and then queries for this smart pointer’s interface type. The resulting pointer is then encapsulated within this _com_ptr_t object. Release is called to decrement the reference count for the previously encapsulated pointer. This routine returns the HRESULT to indicate success or failure.

• CreateInstance( rclsid, dwClsContext )   Creates a new running instance of an object given a CLSID.
  
  
• CreateInstance( clsidString, dwClsContext )   Creates a new running instance of an object given a Unicode string which holds either a CLSID (starting with “{“) or a ProgID.
  
  
• CreateInstance( clsidStringA, dwClsContext )   Creates a new running instance of an object given a multibyte character string which holds either a CLSID (starting with “{“) or a ProgID. Calls MultiByteToWideChar, which assumes that the string is in the ANSI code page rather than an OEM code page.

_com_ptr_t Overview

END Microsoft Specific