IStiDevice::RawReadData method (sti.h)
The IStiDevice::RawReadData method reads data from a still image device.
Syntax
HRESULT RawReadData(
[in, out] LPVOID lpBuffer,
[in, out] LPDWORD lpdwNumberOfBytes,
[in, optional] LPOVERLAPPED lpOverlapped
);
Parameters
[in, out] lpBuffer
Caller-supplied pointer to a buffer to receive data read from the device.
[in, out] lpdwNumberOfBytes
Caller-supplied pointer to a DWORD. The caller must load the DWORD with the number of bytes in the buffer pointed to by lpBuffer. On return, it will contain the number of bytes actually read.
[in, optional] lpOverlapped
Optional, caller-supplied pointer to an OVERLAPPED structure (described in the Microsoft Windows SDK documentation).
Return value
If the operation succeeds, the method returns S_OK. Otherwise, it returns one of the STIERR-prefixed error codes defined in stierr.h.
Remarks
The IStiDevice::RawReadData method calls IStiUSD::RawReadData, which is exported by vendor-supplied minidrivers.
Before calling IStiDevice::RawReadData, clients of the IStiDevice COM interface must call IStillImage::CreateDevice to obtain an IStiDevice interface pointer, which provides access to a specified device.
A call to IStiDevice::RawReadData must be preceded by a call to IStiDevice::LockDevice and followed by a call to IStiDevice::UnLockDevice.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | sti.h (include Sti.h) |