XInputGetCapabilities function (xinput.h)
Retrieves the capabilities and features of a connected controller.
DWORD XInputGetCapabilities( [in] DWORD dwUserIndex, [in] DWORD dwFlags, [out] XINPUT_CAPABILITIES *pCapabilities );
Index of the user's controller. Can be a value in the range 0–3. For information about how this value is determined and how the value maps to indicators on the controller, see Multiple Controllers.
Input flags that identify the controller type. If this value is 0, then the capabilities of all controllers connected to the system are returned. Currently, only one value is supported:
|XINPUT_FLAG_GAMEPAD||Limit query to devices of Xbox 360 Controller type.|
Any value of dwflags other than the above or 0 is illegal and will result in an error break when debugging.
Pointer to an XINPUT_CAPABILITIES structure that receives the controller capabilities.
If the function succeeds, the return value is ERROR_SUCCESS.
If the controller is not connected, the return value is ERROR_DEVICE_NOT_CONNECTED.
If the function fails, the return value is an error code defined in WinError.h. The function does not use SetLastError to set the calling thread's last-error code.