1. Pascal Api
    .Render
    .Update
    .OnWindowEvent(Ev)
2. Pascal Layout Constructor
    CreateButton(Parent): PGuiButton
    .SetPos(Pos[, Size])
    .SetSize(Size)
    .SetParent(Parent)
    CreateButton(Parent, Pos, Size, Caption, @OnPressed): PGuiButton
    CreateButton(Parent, X, Y, W, H, Caption, @OnPressed): PGuiButton
