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handlectrlc

Purpose
Handle Ctrl-C signals.
The function installs or removes a Ctrl-C handler that interacts with prob. Such a handler will invoke XPRSinterrupt() on prob if Ctrl-C is pressed. Note that there can be only one such handler at any time. If handle is NULL then a new handler is installed and the function returns an object that represents the previously installed handler. If handle is not NULL then the function assumes that the object was returned by a previous call to this function. In that case the previous handler is returned.
Synopsis
handlectrlc(prob, handle)
Arguments
prob 
The problem object with which to handler should interact.
handle 
NULL to install a new handler, non- NULL to restore a previous handler.
Return value
A description of the previous handler if a new handler was installed, NULL otherwise.

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