UpdateData won't cut it

[Lost User]

I am designing a program that acts as a countdown timer. However, because the function called from the GUI doesn't stop running until the time has decremented to zero, the GUI can't show how much time is remaining. Here's the source: void CtimerDlg::OnBnClickedStart() { int currentTime = 0; int timeInSeconds = 0; char min[5] = ""; char sec[5] = ""; char setTime[12] = ""; UpdateData(true); currentTime = time(NULL); minutesRemaining = setMinutes; secondsRemaining = setSeconds; sprintf(min, "%i", setMinutes); sprintf(sec, "%i", setSeconds); strcpy(setTime, min); strcat(setTime, " : "); strcat(setTime, sec); startTime = setTime; timeInSeconds = ((setMinutes * 60) + setSeconds); while(timeInSeconds != 0) { if(currentTime != time(NULL)) { if(secondsRemaining == 0) secondsRemaining = 60; timeInSeconds--; secondsRemaining--; sprintf(sec, "%i", secondsRemaining); secLeft.SetWindowText(sec); currentTime = time(NULL); } if(secondsRemaining == 59) { minutesRemaining--; sprintf(min, "%i", minutesRemaining); minLeft.SetWindowText(min); } } UpdateData(false); } // end code How can I get the GUI to update while the progam is executing? -Thanks

[electronicman_x]

Maybe you should spawn a thread to countdown? Jeff Rothenberg Project Engineer Vector CANtech, Inc.

[benjymous]

I'd use a timer instead, then you can have a handler function that gets called every second, which will allow normal GUI operations to continue -- Help me! I'm turning into a grapefruit!

[valikac]

There are several soltuions. One solutin is a timer queue timer that will call a callback after upon tick. Kuphryn

[RaviBee]

kvan07 wrote: How can I get the GUI to update while the progam is executing? Pump the message queue. See my TaskTimer[^] article for instructions. /ravi Let's put "civil" back in "civilization" http://www.ravib.com ravib@ravib.com