about Double click button event

Hello everyone,

I see a piece of code in the following post, but it can't run, prompt the following error, welcome any suggestions, thank you in advance

https://forums.indigorose.com/forum/...051#post205051
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Name: drr.png
Views: 16
Size: 14.2 KB
ID: 305777

Code:

ClickTime = DLL.CallFunction(_SystemFolder .. '\\winmm.dll', 'timeGetTime', '', DLL_RETURN_TYPE_LONG, DLL_CALL_STDCALL)
TimeSpace = ClickTime-TimePrevious
if TimeSpace<300 then
--if the time space between two clicks <300 millisecond, then define it as "double-click"then
--(your action here!)
Dialog.Message('haha', 'Success!')
end
TimePrevious=ClickTime
-------on page preload,you must define TimeSpace=0