// poscx.h

NTSTATUS PosCxOpen(
  [in] WDFDEVICE     device,
  [in] WDFFILEOBJECT fileObject,
  [in] ULONG         deviceInterfaceTag
);
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Windows Driver Kit DDI reference (nf-poscx-poscxopen)

PosCxOpen function

Description

PosCxOpen is called to create an open PosCx library instance. This function initializes all resources it needs to manage a single open instance. It should be called from the driver's EVT_WDF_DEVICE_FILE_CREATE callback.

Parameters

`device` [in]

A handle to a framework device object that represents the device.

`fileObject` [in]

A handle to a framework file object that identifies the caller associated with the open instance.

`deviceInterfaceTag` [in]

An identifier used to specify the caller's device interface in a multi-function device. For a single-interface device, this value should be 0.

Return value

An appropriate NTSTATUS error code that indicates the open instance completion status.

View the official Windows Driver Kit DDI reference