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Displaying Dialog Boxes
The online store can invoke dialog boxes through Windows Media Player. To do this, call External.showPopup from the discovery page script code, providing a custom index value that represents the dialog box to display. This index value has meaning only to the online store code; Windows Media Player does not interpret this value. Windows Media Player then calls IWMPContentPartner::GetItemInfo, passing g_szItemInfo_PopupURL for the bstrInfoName parameter and the index number for the pContext parameter. The plug-in then returns a BSTR containing the URL of the Web page to display in the dialog box and the Player shows the dialog box.
See Also
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