Re: How to update 'Edit Control' text from Timer Callback.

Dan Bloomquist <>
Mon, 22 Oct 2007 18:59:27 GMT
IdleBrain wrote:

Giovanni, thanks a lot for ur sample app. Your sample app works

But, for some reason the OnTimer method in my project is still never
Here is the code that I have been using:

void CxDlg::OnBnClickedOk()
    CString strCurCaption;

    if(strCurCaption == "Start")
        char c[] = "Stop";
        CString strNewCaption(c);
        utmrTx = SetTimer (1, 1000, NULL);
        char c[] = "Start";
        CString strNewCaption(c);
        // Stop the timer

A few things here to make your life easier. In CxDlg add a bool member.
It is considered bad form to use GetDlgItem in dialog members.

bool bTimerRunning;

and a control member

CButton cStartStopButton;

Add this with the wizard so the control gets subclassed.
In the resource view, right click the button and add variable.

void CxDlg::OnClickStartStop( )
    if( bTimmerRunning )
       KillTimer( utmrTx );
       cStartStopButton.SetWindowText( _T("Start") );
       utmrTx= SetTimer( 1, 1000, NULL );
       cStartStopButton.SetWindowText( _T("Stop") );
    bTimmerRunning= !bTimmerRunning;

    :bTimerRunning( false )

You may take this a step further and put the SetWindowText in a
'SetControls' member so it can be call from your on click and InitDialog.

void CxDlg::OnTimer(UINT nIDEvent)

                //Do some stuff

               //Restart the timer

My guess is you don't have the message mapped:

    ON_WM_TIMER( )

Best, Dan.

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