Re: Timer / Thread and COM / JScript

"Igor Tandetnik" <>
Sun, 4 Mar 2007 11:49:32 -0500
"Alexander Adam" <> wrote in message

I am building a JScript host within an ATL ActiveX.
Now I wanted to implement the setTimeout function. Due the heavy load
of WM_TIMER messages I've wanted to use Multimedia Timers
(timerSetEvent etc.) which are running in their own thread. But
whenever I try to invoke my custom function within JScript after the
timer fired, I get an E_UNEXPECTED which I guess comes from calling
from the wrong thread.

There are very few things you can safely do from timeSetEvent callback.
See the documentation on TimeProc:

"Applications should not call any system-defined functions from inside a
callback function, except for PostMessage, timeGetSystemTime,
timeGetTime, timeSetEvent, timeKillEvent, midiOutShortMsg,
midiOutLongMsg, and OutputDebugString."

Consider posting a user-defined message to your window, and call the
script function from that handler.
With best wishes,
    Igor Tandetnik

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