Why Messagebox display twice It's Urgent

jadhavjitendrar

below is my code.i m using CIPAddressCtrl contorl of vc++(mfc).problem is that we thia case statement is execatuted messagebox is dispaly twice.I wont understand .Plz anyone has idea about this help me to solve my problem.. void CServerIPAddress::OnIpnFieldchangedServerIpaddress(NMHDR *pNMHDR, LRESULT *pResult) { LPNMIPADDRESS pIPAddr = reinterpret_cast<LPNMIPADDRESS>(pNMHDR); *pResult = 0; int nFieldIndex = pIPAddr->iField; int nValue = pIPAddr->iValue; CString csValueFormat; switch(nFieldIndex) { case 0: { if(nValue < 1 || nValue > 223) { csValueFormat.Format(_T("%d Is not a valid entry."),nValue); csValueFormat.Append(_T("Please specify a value between 1 and 223")); AfxMessageBox(csValueFormat); } } break; default:break; } }

CPallini

jadhavjitendrar wrote:

Why Messagebox display twice It's Urgent

It shows two times because it's urgent. :rolleyes: BTW:

reposting isn't good.
urgentz requests go automatically into the recycle bin.
your code snippet is not properly formatted.
you may modify you original post, adding more details (for instance is your application multithreaded?).

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modified on Wednesday, September 23, 2009 6:36 AM

theCPkid

As Cpallini said, you should have added to your previous message instead of posting a new message. anyway, you didnt answer my earlier query i.e. whether by any chance OnNotify is called twice? I dont know why i feel i had this stupid problem of a piece of code executing twice inside some windows message handler. and the problem in my case was that windows was sending the message to my control as well as to its parent also and parent was forwarding the message to its child. So, in effect, child was receiving the same message twice. You are suggested to put breakpoints at *all possible places* :sigh: and check if your message handler is being called twice. Happy programming.

David Crow

If you consider that the SysIPAddress32 control is comprised of four Edit controls, those edit controls are sending EN_CHANGE and EN_UPDATE notifications. That may not be an exact answer to your question, but it should give you enough to plow through Spy++ to see exactly what is going on.

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