IPrinterExtensionEventArgs::get_ReasonId method (printerextension.h)

Gets the reason why the printer extension was activated.

This property is read-only.

Syntax

HRESULT get_ReasonId(
  GUID *pReasonId
);

pReasonId

Defines the GUID parameter pReasonId.

Returns an HRESULT value. If the property call was not successful, it returns the appropriate HRESULT error code.

In this mode, preferences for a print job or default print preferences is expected to be displayed:

Guid = {EC8F261F-267C-469F-B5D6-3933023C29CC}
PRINTER_EXTENSION_REASON_PRINT_PREFERENCES = { 0xec8f261f, 0x267c, 0x469f, 0xb5, 0xd6, 0x39, 0x33, 0x2, 0x3c, 0x29, 0xcc };

In this mode a status monitor for the print queue is expected to be displayed:

Guid = {23BB1328-63DE-4293-915B-A6A23D929ACB}
PRINTER_EXTENSION_REASON_DRIVER_EVENT = { 0x23bb1328, 0x63de, 0x4293, 0x91, 0x5b, 0xa6, 0xa2, 0x3d, 0x92, 0x9a, 0xcb };