IStillImage::GetDeviceList method
The IStillImage::GetDeviceList method returns hardware characteristics for all installed still image devices.
Syntax
HRESULT GetDeviceList(
DWORD dwType,
DWORD dwFlags,
[out] DWORD *pdwItemsReturned,
[out] LPVOID *ppBuffer
);
Parameters
dwType
Reserved parameter, use NULL.dwFlags
Reserved parameter, use NULL.pdwItemsReturned [out]
Receives the number of STI_DEVICE_INFORMATION structures supplied in the buffer referenced by ppBuffer.ppBuffer [out]
Receives a handle to an STI-allocated buffer. This buffer will contain an array of STI_DEVICE_INFORMATION structures.
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 IStillImage::GetDeviceList method returns an STI_DEVICE_INFORMATION structure for each installed still-image device. Structure contents are typically used for creating user interface displays and for finding a device's internal name.
Before calling IStillImage::GetDeviceList, clients of the IStillImage COM interface must call IStillImage::StiCreateInstance to obtain an IStillImage interface pointer.
When the caller has finished using the array of STI_DEVICE_INFORMATION structures referenced by ppBuffer, it must deallocate the array by calling LocalFree (described in the Microsoft Windows SDK documentation).
Requirements
Target platform |
Desktop |
Header |
Sti.h (include Sti.h) |
See also