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QueryDeviceNamespace

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Important

The modern print platform is Windows' preferred means of communicating with printers. We recommend that you use Microsoft's IPP inbox class driver, along with Print Support Apps (PSA), to customize the print experience in Windows 10 and 11 for printer device development.

For more information, see Modern print platform and the Print support app design guide.

The IPrintTicketProvider::QueryDeviceNamespace routine provides the default namespace that the PrintTicket-to-DEVMODE and DEVMODE-to-PrintTicket conversions will use if they need to put a feature or option from a private namespace in a Print Ticket.

The following sample code illustrates how this method could be implemented.

STDMETHODIMP
CPrintTicketProvider::QueryDeviceNamespace(BSTR *pDefaultNamespace)
{
    *pDefaultNamespace = SysAllocString(TEXT("https://schemas.contoso.com/printers/seriesA/v.1.0"));
    
    if (!(*pDefaultNamespace))
    {
        return E_OUTOFMEMORY;
    }
 
    return S_OK;
}