Board index » cppbuilder » Cancel button

2005-05-06 02:23:22 AM
cppbuilder9
Hello,
I am looking for a way to put a cancel button in my application so that
when it runs, the user can click on the cancel button (anytime) to stop
the process. Thanks.
Regards,
Claude
 

"Claude Tadonki" < XXXX@XXXXX.COM >wrote in message
with. Typically, you have two options:
1) have a variable somewhere that both your button and your process can
access. Have the button set the variable value, and have the process check
the value periodically. Assuming your process is running in the main
thread, it will also have to call Application->ProcessMessages() before
checking the variable value, so that the button click has a change to be
processed.
2) move the process code into a worker thread. Then the button can simple
terminate the thread when clicked.
Gambit
 

Remy Lebeau (TeamB) wrote:
first (eg the worker thread checks a flag, and ...) Calling
TerminateThread(), for example, is not a good way to kill a thread: it
prevents certain resources used by the thread from being cleaned up.
That does not go down well for most programs, particularly long running
ones.
 

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