WIA_DATA_TRANSFER_INFO structure (wia_xp.h)

The WIA_DATA_TRANSFER_INFO structure is used by applications to describe the buffer used to retrieve bands of data from Windows Image Acquisition (WIA) devices. It is primarily used in conjunction with the methods of the IWiaDataTransfer interface.

Syntax

typedef struct _WIA_DATA_TRANSFER_INFO {
  ULONG ulSize;
  ULONG ulSection;
  ULONG ulBufferSize;
  BOOL  bDoubleBuffer;
  ULONG ulReserved1;
  ULONG ulReserved2;
  ULONG ulReserved3;
} WIA_DATA_TRANSFER_INFO, *PWIA_DATA_TRANSFER_INFO;

Members

ulSize

Type: ULONG

Contains the size of this structure. Must be set to sizeof(WIA_DATA_TRANSFER_INFO) before your application passes this structure to any WIA interface methods.

ulSection

Type: ULONG

Specifies an optional handle to a shared section of memory allocated by the application. If this member is set to NULL, IWiaDataTransfer::idtGetBandedData allocates the shared memory itself.

ulBufferSize

Type: ULONG

The size in bytes of the buffer that is used for the data transfer.

bDoubleBuffer

Type: BOOL

Contains TRUE if the device is double buffered, FALSE if the device is not double buffered.

ulReserved1

Type: ULONG

Reserved for use by the WIA system DLLs. Must be set to zero.

ulReserved2

Type: ULONG

Reserved for use by the WIA system DLLs. Must be set to zero.

ulReserved3

Type: ULONG

Reserved for use by the WIA system DLLs. Must be set to zero.

Requirements