Wnd Proc related issue

Question

Here is my WndProc. I am expecting that when I am calling through Skype from my apps then controls should come to this if block repeatedly but I saw only it coming once.

if (m.Msg == NativeCalls.WM_COPYDATA && m.WParam == NativeCalls.HWND_BROADCAST)

Where am I making a mistake? Can anyone guide me?

protected override void WndProc(ref Message m)
{
    Boolean handled = false;
    if (m.Msg == NativeCalls.APIAttach && (uint) m.LParam == NativeCalls.SKYPECONTROLAPI_ATTACH_SUCCESS)
    {
        // Get the current handle to the Skype window
        NativeCalls.HWND_BROADCAST = m.WParam;
        handled = true;
        m.Result = new IntPtr(1);
    }

    // Skype sends our program messages using WM_COPYDATA. the data is in lParam
    if (m.Msg == NativeCalls.WM_COPYDATA && m.WParam == NativeCalls.HWND_BROADCAST)
    {
        COPYDATASTRUCT data = (COPYDATASTRUCT)Marshal.PtrToStructure(m.LParam, typeof(COPYDATASTRUCT));
        StatusTextBox.Items.Add(data.lpData + Environment.NewLine);

        // Check for connection
        //if (data.lpData.IndexOf("CONNSTATUS ONLINE") > -1)
        // ConnectButton.IsEnabled = false;

        // Check for calls
        IsCallInProgress(data.lpData);
        handled = true;
        m.Result = new IntPtr(1);
    }

    m.Result = IntPtr.Zero;
    if (handled) DefWndProc(ref m); else base.WndProc(ref m);
    //base.WndProc(ref m);
}

here i attach the link of my win application and that is https://onedrive.live.com/#cid=C4A6F16F34D7540A&id=C4A6F16F34D7540A!126 just download the skypecalltest and run it.

before run my apps just login to skype and then run my apps where you put a phone no and click on call button then you can see the controls is not coming repeatedly to the second if block.

so what i need to change in my code as a result control will come to second if block.

in the same link there is another same kind of apps which is based on wpf. that is working where wndproc is calling repeatedly. if possible check that code too and guide me what i am missing or making mistake. thanks thanks

You are calling `base.WndProc(ref m);` twice when `handled` is `false`. — Ashigore, Apr 23 '14 at 14:51
very easily anyone can catch the problem if they download two zip files from the link i specified. the win apps is developed by me which i inspired by wpf apps. both can be downloaded from that link. thanks — Thomas, Apr 23 '14 at 14:58
I made some change in my answer to your previous [question](http://stackoverflow.com/questions/23220111/how-to-use-this-wndproc-in-windows-forms-application/23220236#23220236)... Maybe the problem is because `m.Result` always returns zero, so I corrected that. — Elvedin Hamzagic, Apr 23 '14 at 15:12

score 0 · Answer 1 · answered Apr 23 '14 at 14:43

0

What O/S are you running this on?

If Windows 7 or later, your application may need to explicitly opt into receiving WM_COPYDATA messages by calling ChangeWindowMessageFilter or ChangeWindowMessageFilterEx.

answered Apr 23 '14 at 14:43

500 - Internal Server Error

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if u go to the link which i provide in my question then u can see SkypeRecording.zip file is there. just download it and see the code there is no ChangeWindowMessageFilter function used there but that apps works fine. i develop a similar type of apps which is win apps but that is not working. – Thomas Apr 23 '14 at 14:48
Unlikely, he wouldn't get the first one if that were necessary. UIPI doesn't have a "works once" mode. – Hans Passant Apr 23 '14 at 15:39
@Hans Passant : what u try to say not clear. what r u trying to mean "he wouldn't get the first one if that were necessary" ? – Thomas Apr 24 '14 at 06:37

Wnd Proc related issue

1 Answers1