Re: PLEASE HELP - loop exit problem

Marko,

I believe you need to place  Application->ProcessMessages();  at the top of 
your for loop so the application will process any button clicks at the 
beginning of each loop.  Then your if statement in the for loop will see the 
change to "continue"

Larry J.


"Marko" <marko@marko.webserwer.pl> wrote in message 
news:46991470@newsgroups.borland.com...
> hello
>

"Marko" <marko@marko.webserwer.pl> wrote in message
news:46991470@newsgroups.borland.com...

> there is a for loop in my software i need to terminate by SpeedButton

Your loop needs to call Application->ProcessMessages() periodically in order
for the OnClick event to function while the loop is running.

> while a loop is running i can't change the "continue" variable.

That is because you are not letting new messages be pumped from the message
queue.


Gambit

"LarryJ" <LarryJ33@austin.rr.com> wrote in message
news:46992c32$1@newsgroups.borland.com...

> I believe you need to place  Application->ProcessMessages();
> at the top of your for loop so the application will process any
> button clicks at the beginning of each loop.

Do not call it on each loop iteration.  ProcessMessage() is an expensive
call to make.  It will seriously degrade overall performance of the
application if you call it that often.  Call it every 10th or 100th
iteration, for instance.


Gambit

hello

i have a problem with loop exit operation

there is a for loop in my software i need to terminate by SpeedButton

my loop looks like this (for example)

for(int i=0; i<2500; i++)
{

if(continue==false) break;   //exit from the loop on request

//other RS232 operations

}

im seting the "continue" variable to false state by clicking a
SpeedButton

void __fastcall TForm1::SpeedButtonSTOPClick(TObject *Sender)
{
     continue=false;   //continue is a global variable
}


but.... while a loop is running i can't change the "continue"
variable.
my software is busy ... the SpeedButtonSTOPClick function is called just 
after that (but it's too late)