Retrieves the device's force feedback capabilities.
- macOS 10.2+
An opaque reference handle to the device object that is be disposed of. This handle is obtained from a previous call to FFCreateDevice.
Pointer to a FFCAPABILITIES structure that is to be filled in by the this call.
If the method succeeds, the return value is FF_OK. If the method fails, the return value can be one of the following error values: