Usage of WndProc for receiving message from skype c#

i am trying hard to capture & save skype conversation to file. i go through this tutorialhttp://galratner.com/blogs/net/archive/2011/08/27/how-to-record-skype-voice-conversations.aspx also download wpf based the source code which i run and got the success.

i follow the everything but my application is not working. the main problem is regarding receiving message from skype throughWndProc() function. my WndProc() function is calling only once but the application which i download there i saw theirWndProc() function is calling repeatedly for getting message from skype. i am trying for long time to capture the skype conversation but still no luck.

i already post few questions for capturing the skype conversation in this forum but not getting no expected clue. 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 and definitely notice thatWndProc() function is calling repeatedly for getting message from skype.

here is my WndProc() body

protectedoverridevoidWndProc(refMessage m){Boolean handled =false;if(m.Msg==NativeCalls.APIAttach&&(uint)m.LParam==NativeCalls.SKYPECONTROLAPI_ATTACH_SUCCESS){// Get the current handle to the Skype windowNativeCalls.HWND_BROADCAST = m.WParam;
                handled =true;
                m.Result=newIntPtr(1);}// Skype sends our program messages using WM_COPYDATA. the data is in lParamif(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 callsIsCallInProgress(data.lpData);
                handled =true;
                m.Result=newIntPtr(1);}
            m.Result=IntPtr.Zero;if(handled)DefWndProc(ref m);elsebase.WndProc(ref m);}

please please help me to capture the problem and guide me where i need to rectify as a resultWndProc() should work as expected. thanks