IQuickActivate::QuickActivate  4HMX.VR

Quick activates a control.

HRESULT QuickActivate(

Parameters

pQaContainer

[in] Pointer to a structure containing information about the container.

pQaControl

[out] Pointer to a structure filled in by the control to return information about the control to the container. The container calling this method must reserve memory for this structure.

Return Values

S_OK

The quick activation is proceeding and the QACONTROL05C8LL structure has been completed.

E_FAIL

An unexpected error occurred. The quick activation is not completed.

Remarks

If the control does not support IQuickActivate, the container performs certain handshaking operations when it loads the control. The container calls certain interfaces on the control and the control, in turn, calls back to certain interfaces on the container s client site. First, the container creates the control object and calls QueryInterface to query for interfaces that it needs. Then, the container calls IOleObjectSetClientSite on the control, passing a pointer to its client site. Next, the control calls QueryInterface on this site, retrieving a pointer to additional necessary interfaces.

Using the new IQuickActivate::QuickActivate method, the container passes a pointer to a QACONTAINER structure. The structure contains pointers to interfaces which are needed by the control and the values of some ambient properties that the control may need. Upon return, the control passes a pointer to a QACONTROL structure that contains pointers to its own interfaces that the container requires, and additional status information.

The IPersist*::Load and IPersist*::InitNew methods should be called after quick activation occurs. The control should establish its connections to the container s sinks during quick activation. However, these connections are not live until IPersist*::Load or IPersist*::InitNew has been called.

See Also