ffi_helpers.raw_hwnd = utils.opcode_scan("engine.dll", "8B 0D ?? ?? ?? ?? 85 C9 74 16 8B 01 8B") or error("Invalid signature #1")
ffi_helpers.raw_FlashWindow = utils.opcode_scan("gameoverlayrenderer.dll", "55 8B EC 83 EC 14 8B 45 0C F7") or error("Invalid signature #2")
ffi_helpers.raw_insn_jmp_ecx = utils.opcode_scan("gameoverlayrenderer.dll", "FF E1") or error("Invalid signature #3")
ffi_helpers.raw_GetForegroundWindow = utils.opcode_scan("gameoverlayrenderer.dll", "FF 15 ?? ?? ?? ?? 3B C6 74") or error("Invalid signature #4")

ffi_helpers.hwnd_ptr = ((ffi.cast("uintptr_t***", ffi.cast("uintptr_t", ffi_helpers.raw_hwnd) + 2)[0])[0] + 2)
ffi_helpers.FlashWindow = ffi.cast("int(__stdcall*)(uintptr_t, int)", ffi_helpers.raw_FlashWindow)
ffi_helpers.insn_jmp_ecx = ffi.cast("int(__thiscall*)(uintptr_t)", ffi_helpers.raw_insn_jmp_ecx)
ffi_helpers.GetForegroundWindow = (ffi.cast("uintptr_t**", ffi.cast("uintptr_t", ffi_helpers.raw_GetForegroundWindow) + 2)[0])[0]

helpers.get_csgo_hwnd = function()
return ffi_helpers.hwnd_ptr[0]
end

helpers.get_foreground_hwnd = function()
return ffi_helpers.insn_jmp_ecx(ffi_helpers.GetForegroundWindow)
end

helpers.notify_user = function()
local csgo_hwnd = helpers.get_csgo_hwnd()
if helpers.get_foreground_hwnd() ~= csgo_hwnd then
ffi_helpers.FlashWindow(csgo_hwnd, 1)
end
end