Model for Hosting RDO Data Controls in a Container

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A container hosts an RDO data control as follows:

  • The container obtains an IVBDSC interface from the data control. If it cannot find IVBDSC, it is not a data control.

  • The container obtains the ICursor interfaces from the data control. These interfaces supply a Cursor object that can be manipulated by a client.

  • The container hooks up to the data control's INotifyDBEvents interface. This interface allows the container to receive notifications from the data control. The container should support the INotifyDBEventsSink interface to do this.

A container hosts an RDO data-bound control as follows:

  • The control supports the IBoundObject interface and the container supports the IBoundObjectSite interface. The control obtains the container's IBoundObjectSite interface, and the container obtains the IBoundObject interface from the control.

  • The control supports the IPropNotifySink interface and hooks up with the container. This allows the container to receive notifications from the control.

  • If the control supports INotifyDBEventsSink, it can receive notifications from an RDO data control after connecting with the data control's INotifyDBEvents interface.

  • The control then can receive cursor objects from the data control (directly or through the container). The cursors can then be manipulated and scrolled. At this point, the RDO data-bound control is successfully bound.

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