Edit

_com_ptr_t::CreateInstance

  • Article

Microsoft Specific

Creates a new instance of an object given a CLSID or ProgID.

Syntax

HRESULT CreateInstance(
   const CLSID& rclsid,
   IUnknown* pOuter=NULL,
   DWORD dwClsContext = CLSCTX_ALL
) throw( );
HRESULT CreateInstance(
   LPCWSTR 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, using the ANSI code page, that holds either a CLSID (starting with "{") or a ProgID.

dwClsContext
Context for running executable code.

pOuter
The outer unknown for aggregation.

Remarks

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 that 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 that 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.

END Microsoft Specific

See also

_com_ptr_t Class