-
No problem with MessageBox.
How To Ask Questions The Smart Way. 2004
Don't rush to claim that you have found a bug.
Questions Not To Ask
My program doesn't work. I think system facility X is broken. -
Perhaps you should read the manual.
How To Ask Questions The Smart Way. 2004
How To Interpret Answers.
RTFM and STFW: How To Tell You've Seriously Screwed Up. - Indicators can not Sleep; they can not use MessageBox.
Program Running - MQL4 programs - MQL4 Reference

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hi everyone i have a custom indicator that have a button that works with chart event function for delete or create some object tables
the custom indicator also have a massageboxw (include <WinUser32.mqh>)
but as soon as i put the button code in the event function the massageboxw doesn't work right // also console say the indicator is too slow need to rewrite it