IOCTL_CHANGER_SET_ACCESS - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ntddchgr.h

// CTL_CODE(0x0030, 0x004, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)
#define IOCTL_CHANGER_SET_ACCESS 0x0030C010
View the official Windows Driver Kit DDI reference
// winioctl.h

// CTL_CODE(0x0030, 0x004, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)
#define IOCTL_CHANGER_SET_ACCESS 0x0030C010
View the official Win32 API reference

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Windows Driver Kit DDI reference (ni-ntddchgr-ioctl_changer_set_access)

IOCTL_CHANGER_SET_ACCESS IOCTL

Description

Sets the state of the device's import/export port (IEport), door, or keypad.

Parameters

Major code

Input buffer

The buffer at Irp->AssociatedIrp.SystemBuffer contains a CHANGER_SET_ACCESS structure indicating the element and the operation to perform.

Input buffer length

Parameters.DeviceIoControl.InputBufferLength in the I/O stack location indicates the size, in bytes, of the parameter buffer, which must be >= sizeof(CHANGER_SET_ACCESS).

Output buffer

None.

Output buffer length

None.

Input/output buffer

Input/output buffer length

Status block

The Information field is set to the number of bytes set. The Status field is set to STATUS_SUCCESS, or possibly to STATUS_INFO_LENGTH_MISMATCH, STATUS_INSUFFICIENT_RESOURCES, STATUS_INVALID_DEVICE_REQUEST, or STATUS_INVALID_PARAMETER.

See also

CHANGER_SET_ACCESS

ChangerSetAccess

View the official Windows Driver Kit DDI reference

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Win32 API reference (ni-winioctl-ioctl_changer_set_access)

IOCTL_CHANGER_SET_ACCESS IOCTL

Description

Sets the state of the device's insert/eject port, door, or keypad.

To perform this operation, call the DeviceIoControl function with the following parameters.

BOOL DeviceIoControl(
  (HANDLE) hDevice,             // handle to device
  IOCTL_CHANGER_SET_ACCESS,     // dwIoControlCode
  (LPVOID) lpInBuffer,          // input buffer
  (DWORD) nInBufferSize,        // size of input buffer
  NULL,                         // lpOutBuffer
  0,                            // nOutBufferSize
  (LPDWORD) lpBytesReturned,    // number of bytes returned
  (LPOVERLAPPED) lpOverlapped   // OVERLAPPED structure
);

Parameters

Input buffer

Input buffer length

Output buffer

Output buffer length

Input/output buffer

Input/output buffer length

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful.

Otherwise, Status to the appropriate error condition as a NTSTATUS code.

For more information, see NTSTATUS Values.

See also

View the official Win32 API reference

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