# hgeGUI::Update Updates the GUI controls and processes user input.
    int Update(
      float fDeltaTime
    );
## Parameters fDeltaTime Amount of time elapsed since last call to the Update method in seconds. ## Return value If one of the controls has changed it's state, Update returns that control's identificator. If Leave method was called and all the controls have finished their animation, Update returns -1. Otherwise it returns 0. ## Remarks Call the Update method in your frame function to update the GUI. The amount of time elapsed since last call to frame function may be obtained with Timer_GetDelta system layer function. ## Requirements Header: hgegui.h Import library: hgehelp.lib