Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

DDE code kills DDEML.dll and USER.exe

Posted on 1998-03-19
1
Medium Priority
?
253 Views
Last Modified: 2013-11-19
why does this code eat memory and wind up GPFing the system?


CheckDlg::OnOK()
{
        // TODO: Add extra validation here
        DWORD pidInst =0;
        WORD result = DdeInitialize(&pidInst,DdeCallback,APPCMD_CLIENTONLY
,0L);
       
        //create a string handle for the Dde conversation
        HSZ server = DdeCreateStringHandle(pidInst,"MrktLink",CP_WINANSI);
       
        HSZ topic = DdeCreateStringHandle(pidInst,"Rates",CP_WINANSI);

        //connect to the DDE server application
        HCONV thisconv = DdeConnect(pidInst,server,topic,NULL);
        bool ok =  (thisconv !=NULL);

        DdeFreeStringHandle(pidInst,server);
        DdeFreeStringHandle(pidInst,topic);
        int t =0;
        HSZ item = DdeCreateStringHandle(pidInst,"NZD",CP_WINANSI);
        m_TOTAL=0;
        while (t <20)
        {
                HDDEDATA nzdat = DdeCreateDataHandle(pidInst,0,0,0,item,CF_
TEXT,NULL);
                LPDWORD result =0;
                nzdat = DdeClientTransaction(NULL,0L,thisconv,item,CF_TEXT,XT
YP_REQUEST,1200,result);
                LPDWORD sizereturned=0;
                CString tempText2 =(CString) DdeAccessData(nzdat,sizereturned);
                DdeUnaccessData(nzdat);
                DdeFreedataHandle(nzdat);
                m_RESULT = tempText2;
                m_TOTAL +=1;
                UpdateData(false);
        }
0
Comment
Question by:bryceb
1 Comment
 
LVL 3

Accepted Solution

by:
byang earned 200 total points
ID: 1317097
You never updated "t" in the while loop, so (t<20) is always true. That's an endless loop at least.
0

Featured Post

Get your problem seen by more experts

Be seen. Boost your question’s priority for more expert views and faster solutions

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Have you tried to learn about Unicode, UTF-8, and multibyte text encoding and all the articles are just too "academic" or too technical? This article aims to make the whole topic easy for just about anyone to understand.
In this post we will learn different types of Android Layout and some basics of an Android App.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Integration Management Part 2
Suggested Courses
Course of the Month13 days, 7 hours left to enroll

578 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question