From PDF XChange PDF SDK
The method retrieves a list of all parameters that may be returned by the specified file format decoder.
HRESULT GetOpenFilters([in] ULONG nFlags, [out, retval] BSTR* sFilters);
- [in] Specifies the format to which the returned by the specified file format decoder.
- [out, retval] Pointer to BSTR buffer that will be filled with all parameters that can be returned by the specified encoder.
Returns S_OK if operation was successful or error code in other cases.