IOCTL_HID_ENUM_OBJECTS
Returns a list of input sources, such as buttons, on a HID class device.
Parameters
- hDevice
- Handle to the HID class device.
- dwIoControlCode
- IOCTL_HID_ENUM_OBJECTS
- lpInBuffer
- Pointer to an input buffer containing a ShiddiEnumObjectHeader structure followed by one or more SHiddiEnumObject structures.
- nInBufferSize
- The length of the input buffer.
- lpOutBuffer
- Pointer to an output buffer containing a SHiddiEnumObjectHeader structure followed by one or more SHiddiEnumObject structures. Must be equal to lpInBuffer.
- nOutBufferSize
- Length of the output buffer; must be the same as nInBufferSize.
- lpBytesReturned
- A count of the total bytes returned.
- lpOverlapped
- NULL
Remarks
The input and output buffer pointers and lengths must be identical. The buffer must contain a SHiddiEnumObjectHeader followed by enough space for the HID class driver to write all the SHiddiEnumObject structures indicated by the header. The objects must be listed in a fixed order: axes first, then POVs (for joysticks), then buttons.