See the POD:

Timeout (NEWVALUE)

If NEWVALUE is present, set the timeout value (in milliseconds) used for DDE operations; return the old value.

The timeout value is initially set to $Win32::DDE::Client::Timeout when the object is constructed. $Win32::DDE::Client::Timeout is set to 1000 when the module is loaded.

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In reply to Re: $SIG{ALRM} timeout and Win32::DDE::Client hangs? by BrowserUk
in thread $SIG{ALRM} timeout and Win32::DDE::Client hangs? by TedPride

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