Jaa

Using the Talk button

  • Artikkeli

Ever wanted to use the phone's green Talk key (sometimes called the Send button) in your application?  You can, but the docs are pretty well hidden, so I thought I'd point them out: https://msdn.microsoft.com/library/default.asp?url=/library/en-us/APISP/html/sp_porting_guide_qgcc.asp?frame=true

Basically, your app sends a SHCMBM_OVERRIDEKEY message, once, to its own menu bar telling it "When the user presses the Talk button (when my app is foreground) I want to recieve that as a WM_HOTKEY from now on."

Obviously, the most common use for this is to initiate a phone call to a specific number from within your app (using PhoneMakeCall()).   I wouldn't recommend using it for something non-phone-related.

On Smartphone, you can also override some of the other hardware buttons like Volume Up and Down.

- Jason Fuller

Comments

  • Anonymous
    September 07, 2005
    Is there a way for a developer to force the speakerphone on during a call? The common request on sites like the pdaphonehome forums is for the speakerphone to be triggered by a physical button press. To rephrase this, could someone write a program that is assigned to a button that forces the speakerphone to toggle during a phone call.

    Thanks!

  • Anonymous
    September 07, 2005
    That is already standard functionality. While in a call, press and hold the call button - this will toggle the speakerphone on and off.

  • Anonymous
    September 08, 2005
    Boy, I wish I could edit that other post. I have no idea what I was thinking. I meant to ask if there was a way to MUTE the call. Again, I have no idea why I wrote about the speakerphone.

    Ugh.

    Can we assign Mute to a button...

    D.

  • Anonymous
    May 26, 2006
    Hi,

    how can I catch the red and green phone buttons on a Pocket PC Phone (WM5.0) system wide?

    Why - because I am writing my own phone app to replace the default.

    Thx.
    Paul

  • Anonymous
    June 21, 2006
    It seems that if SHCMBM_OVERRIDEKEY sent in a called process ,it did nothing.
    What do you think about this,dear everyone?

  • Anonymous
    June 27, 2006
    Application must include aygshell.lib
    to use SHCMBM_OVERRIDEKEY, but license fee for each smartphone is US$16 when using aygshell.lib. If you license a core version without aygshell.lib only costs you US$3.0.
    My problem is: How can I get the
    green talk key using core version?

  • Anonymous
    September 15, 2006
    I'd love to see an example of this posted.  I can't find a single working example online.

  • Anonymous
    October 18, 2006
    Is this a C++ only thing or is there a way to trap the talk key in C#?

  • Anonymous
    April 09, 2007
    I'd like to get notification for the Red button in my application as well. If anyone knows how to do this, please let me know! Thanks.

  • Anonymous
    April 11, 2007
    You can read this russian forum http://www.rsdn.ru/Forum/?mid=1957782 with my answer (with code).

  • Anonymous
    August 05, 2007
    On WM 5 Use Following: HWND wnd =  ((CMainFrame*)AfxGetMainWnd())->m_wndCommandBar.m_hWnd; ::SendMessage (wnd, SHCMBM_OVERRIDEKEY, VK_TTALK,             MAKELPARAM (SHMBOF_NODEFAULT | SHMBOF_NOTIFY,                         SHMBOF_NODEFAULT | SHMBOF_NOTIFY));

  • Anonymous
    September 16, 2007
    Other than the example that imranbaig given, anyone have another? I cannot understand it. Sorry.

  • Anonymous
    November 25, 2007
    How can I cath the RED button(VK_TEND) in my application?

  • Anonymous
    May 21, 2009
    how come if i have a full screen application without menubar?