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call a function continuously till a button on dialog box is clicked

Posted on 2004-04-28
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Hi,
 I want a call a function continuously till a button is clicked.
created a dialog resource having a listbox and a button.
as soon as the dialog opens start calling function
return from the function should be placed in list box.
this should continue untill button on dialog is clicked.

I tried putting function in a loop but it freezes the dialog untill the loop is completed.

Iam new to vc++. help me.please

Thanks
Sahaj

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Question by:su_us_76
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AndyAinscow earned 750 total points
ID: 10942696
A simple way is to use a timer.

In your OnInitDialog have a line
SetTimer(1, 100, NULL);
this should generate a timer event 10 times a second (note it doesn't mean 10 timer events in one second if the routine takes longer than 0.1 seconds or the system is busy then you will get less timer events).
map the WM_TIMER message (class wizard).
In that call your function.
For your button provide a handler with the line
KillTimer(1);
this is to stop the timer.

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Expert Comment

by:wayside
ID: 10942870
You could create a thread which will run a loop that calls your function, and post an event back to the dialog when you want to add something in the listbox. You can use a global variable set when the button is pressed to break out of the loop and exit the thread.
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by:su_us_76
ID: 11118952
Thanks  Andy.
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