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NF:ctxtcall.IContextCallback.ContextCallback |
IContextCallback::ContextCallback (ctxtcall.h) |
Enters the object context, executes the specified function, and returns. |
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com\icontextcallback_contextcallback.htm |
com |
7446792e-7f29-4ad4-8245-b86f63f2df18 |
12/05/2018 |
ContextCallback, ContextCallback method [COM], ContextCallback method [COM],IContextCallback interface, IContextCallback interface [COM],ContextCallback method, IContextCallback.ContextCallback, IContextCallback::ContextCallback, _com_icontextcallback_contextcallback, com.icontextcallback_contextcallback, ctxtcall/IContextCallback::ContextCallback |
ctxtcall.h |
Windows |
Windows 2000 Professional [desktop apps \| UWP apps] |
Windows 2000 Server [desktop apps \| UWP apps] |
Ctxtcall.idl |
Windows |
19H1 |
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Enters the object context, executes the specified function, and returns.
The function to be called inside the object context.
The data to be passed to the function when it is called in the context.
The IID of the call that is being simulated. See Remarks for more information.
The method number of the call that is being simulated. See Remarks for more information.
This parameter is reserved and must be NULL.
This method can return the standard return values E_INVALIDARG, E_OUTOFMEMORY, E_UNEXPECTED, and E_FAIL. If none of these failures occur, the return value of this function is the HRESULT value returned by the pfnCallback function.
This method simulates a method call on an object inside the context. It is intended for low-level operations, such as cleanup/lazy marshaling, that respect the application's reentrancy expectations.
To give the infrastructure information, an interface and method number must be specified. The parameter riid must not be IID_IUnknown, and the method number must not be less than 3.
If riid is set to IID_IEnterActivityWithNoLock, the function is executed without an activity lock.
If riid is set to IID_ICallbackWithNoReentrancyToApplicationSTA, the function does not reenter an ASTA arbitrarily. Most apps should set riid to this values for general purpose use.