Hi all,
the subject is a cryptic (for me) comment found in a MS struct declaration that can be found in winbio_ioctl.h:
When it's time to assign some memory to "Data" how can I proceed?
For example I've the following:
PWINBIO_CAPTURE_DATA captureData = NULL;
BYTE CaptureBuffer[1000];
...
GetIoRequestParams(FxRequest,
&controlCode,
(PUCHAR *)&captureParams,
&inputBufferSize,
(PUCHAR *)&captureData,
&outputBufferSize);
...
captureData->CaptureData.Size = 1000;
captureData->CaptureData.Data = CaptureBuffer;
The last line generate an error (expression must be a modifiable lvalue) and I cannot understand how can I assign memory to that BYTE Data[1] array...
Thank a lot!
Dadeur
the subject is a cryptic (for me) comment found in a MS struct declaration that can be found in winbio_ioctl.h:
Code:
// The WINBIO_DATA structure associates a length, in
// bytes, with an arbitrary block of contiguous memory.
//
typedef struct _WINBIO_DATA{
DWORD Size;
BYTE Data[1]; // Defined as a length of 1 to avoid compiler warning.
} WINBIO_DATA, *PWINBIO_DATA;
...
//
// A container for biometric captured data.
// OUT payload for IOCTL_BIOMETRIC_CAPTURE_DATA
//
typedef struct _WINBIO_CAPTURE_DATA {
DWORD PayloadSize;
HRESULT WinBioHresult;
WINBIO_SENSOR_STATUS SensorStatus;
WINBIO_REJECT_DETAIL RejectDetail;
WINBIO_DATA CaptureData;
} WINBIO_CAPTURE_DATA, *PWINBIO_CAPTURE_DATA;For example I've the following:
PWINBIO_CAPTURE_DATA captureData = NULL;
BYTE CaptureBuffer[1000];
...
GetIoRequestParams(FxRequest,
&controlCode,
(PUCHAR *)&captureParams,
&inputBufferSize,
(PUCHAR *)&captureData,
&outputBufferSize);
...
captureData->CaptureData.Size = 1000;
captureData->CaptureData.Data = CaptureBuffer;
The last line generate an error (expression must be a modifiable lvalue) and I cannot understand how can I assign memory to that BYTE Data[1] array...
Thank a lot!
Dadeur
