IOleItemContainer::GetObject - OLE Programmer's Reference

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IOleItemContainer::GetObject

Returns a pointer to the object identified by the specified name.

HRESULT GetObject(

LPOLESTR pszItem,	//Name of the object requested
DWORD dwSpeedNeeded,	//Speed requirements on binding
IBindCtx *pbc,	//Bind context to be used
REFIID riid,	//IID of interface pointer desired
void **ppvObject	//Receives interface pointer
);

Parameters
pszItem

[in] Points to a zero-terminated string containing the container's name for the requested object. For Win32 applications, the LPOLESTR type indicates a wide character string (two bytes per character); otherwise, the string has one byte per character.

dwSpeedNeeded

[in] Indicates approximately how long the caller will wait to get the object. The legal values for dwSpeedNeeded are taken from the enumeration BINDSPEED. For information on the BINDSPEED enumeration, see the "Data Structures" section.

pbc

[in] Points to the bind context to be used in this binding operation. The bind context caches objects bound during the binding process, contains parameters that apply to all operations using the bind context, and provides the means by which the binding implementation should retrieve information about its environment. For more information, see IBindCtx.

riid

[in] Specifies the type of interface pointer requested.

ppvObject

[out] Receives a pointer to the object named by pszItem. If an error occurs, the implementation sets *ppvObject to NULL. If *ppvObject is non-NULL, the implementation must call IUnknown::AddRef on the parameter; it is the caller's responsibility to call IUnknown::Release.

Return Values
S_OK

The specified object was successfully returned.

MK_E_EXCEEDEDDEADLINE

The binding operation could not be completed within the time limit specified by the bind context's BIND_OPTS structure, or with the speed indicated by the dwSpeedNeeded parameter.

MK_E_NOOBJECT

The parameter pszItem does not identify a object in this container.

E_NOINTERFACE

The requested interface was not available.

E_OUTOFMEMORY

Insufficient memory.

Comments
The item moniker implementation of IMoniker::BindToObject calls this method, passing the name stored within the item moniker as the pszItem parameter.

Notes to Implementors
Your implementation of IOleItemContainer::GetObject should first determine whether pszItem is a valid name for one of the container's objects. If not, you should return MK_E_NOOBJECT.

If pszItem names an embedded or linked object, your implementation must check the value of the dwSpeedNeeded parameter. If the value is BINDSPEED_IMMEDIATE and the object is not yet loaded, you should return MK_E_EXCEEDEDDEADLINE. If the object is loaded, your implementation should determine whether the object is running (for example, by calling the OleIsRunning API function). If it is not running and the dwSpeedNeeded value is BINDSPEED_MODERATE, your implementation should return MK_E_EXCEEDEDDEADLINE. If the object is not running and dwSpeedNeeded is BINDSPEED_INDEFINITE, your implementation should call the OleRun API function to put the object in the running state. Then it can query the object for the requested interface. Note that it is important the object be running before you query for the interface.

If pszItem names a pseudo-object, your implementation can ignore the dwSpeedNeeded parameter because a pseudo-object is running whenever its container is running. In this case, your implementation can simply query for the requested interface.

If you want more specific information about the time limit than is given by dwSpeedNeeded, you can call IBindCtx::GetBindOptions on the pbc parameter to get the actual deadline parameter.

See Also
IMoniker::BindToObject, IBindCtx::GetBindOptions, OleIsRunning, OleRun

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