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Question about PMSetPrintSettingsExtendedData

I am writing a PDE where the custom controls in the PDE pane h ve to be initialised by values sent from the main application.

The sample PDEproject seems not to illustrate exchange of data in this direction but only from the PDE to the main app.

I inserted the following code in DoPrint just before the call to PMSessionUseSheets
{
Boolean extendedData=true;
long lgnExtendedData=sizeof(extendedData);

err = PMSetPrintSettingsExtendedData( printSettings, 'PRDX', lgnExtendedData,
(void*)&extendedData );
}
                    if(!err){
                        err = PMSessionUseSheets(printSession, parentWindow, myPrintDialogDoneProc);
.......

PMSetPrintSettingsExtendedData returns noErr : everything seems OK on the app side.

In the PDE, the data is not found : PMTicketGetCFData returns kPMKeyNotFound.

I checked that the kMyAppPrintSettingsKey constant value is CFSTR("com.apple.print.PrintSettingsTicket.PRDX")

Thanks for any help.

Christian.

PS : I am using Tiger 10.4.3

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