I’m trying to write a game using steamworks, based on provided example SpaceWars. But there is not mouse action support, and i failed to introduce it. I rewrote steam_controller.vdf, added action handlers, but nothing works. Functions like SteamInput( )->GetDigitalActionData() always return false and SteamInput( )->GetConnectedControllers return 0, so it does not recognize mouse at all. What is the correct way to deal with mouse actions?

my .vdf file

"controller_mappings"
{
    "version"       "8"
    "title"         "#title"
    "description"       "#description"
    "controller_type"   "controller_steamcontroller_gordon"
    "Timestamp"     "1529529957"
    "actions"
    {
        "Mouse"
        {
            "title"     "#Set_Mouse"
            "legacy_set"        "0"
            "StickPadGyro"
            {
                "Cursor"
                {
                    "title"     "#Action_Cursor"
                    "input_mode"        "absolute_mouse"
                    "os_mouse"      "1"
                }
            }
            "Button"
            {
                "scroll_up"     "#Action_ScrollUp"
                "scroll_down"       "#Action_ScrollDown"
                "mouse_lmb"     "#Action_LMB"
                "mouse_rmb"     "#Action_RMB"
                "mouse_mmb"     "#Action_MMB"
            }
        }
    }
    "action_layers"
    {
    }
    "localization"
    {
        "english"
        {
            "Action_ScrollUp"   "ScrollUp"
            "Action_ScrollDown" "ScrollDown"
            "Action_LMB"        "MouseLMB"
            "Action_RMB"        "MouseRMB"
            "Action_MMB"        "MouseMMB"
        }
    }
}

in GameEngine i have

enum ECONTROLLERDIGITALACTION
{
    eControllerDigitalAction_LMB_Pressed,
    eControllerDigitalAction_RMB_Pressed,
    eControllerDigitalAction_MMB_Pressed,
}

and register them as

m_ControllerDigitalActionHandles[eControllerDigitalAction_LMB_Pressed] = SteamInput()->GetDigitalActionHandle("mouse_lmb");
    m_ControllerDigitalActionHandles[eControllerDigitalAction_RMB_Pressed] = SteamInput()->GetDigitalActionHandle("mouse_rmb");
    m_ControllerDigitalActionHandles[eControllerDigitalAction_MMB_Pressed] = SteamInput()->GetDigitalActionHandle("mouse_mmb");

but
m_pGameEngine->BIsControllerActionActive(ECONTROLLERDIGITALACTION::eControllerDigitalAction_LMB_Pressed);
always returns false. What should i do?