MessageBox gives exception 1

[HyperEngineer]

I am using VC++ 2008. I am using MessageBox to give error info to the user. The code compiles fine. But when I run the program it will crash when it tries to display the MessageBox. (I tried MessageBox("This is an error"); MessageBox(_T("This is an error")); AfxMessageBox("This is an error"); and AfxMessageBox(_T("This is an error")) The exception is:

Unhandled exception at 0x7c80a5a2 in myapp.exe: 0xC0000005: Access violation reading location 0xfefefefe.

thanks,

HyperEngineer
If it ain't broke, it probably needs improvement.

 

[Salem]

Repeated 0xfe indicates that you're trying to access memory which has already been freed.

http://www.codeguru.com/Cpp/W-P/win32/tutorials/article.php/c9535/

--
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.

 

[HyperEngineer]

Thanks Salem. That's what I was doing. In another class that was called from the main class, I was doing strange things with strtok_s(). And the program didn't like it.

buff = GetCommandLine();

token = strtok_s(buff, &seps1, &next_token);
sprintf_s(buff, 128, "%s", next_token);
token = strtok_s(buff, &seps2, &next_token);

Something was happening to the memory with this. Now the code is

buff = GetCommandLine();

token = strtok_s(buff, &seps1, &next_token);
token = strtok_s(NULL, &seps2, &next_token);

Don't know why I thought I had to readjust the input into strtok_s() because I was changing the seperator.

Everything is OK now. Why it affected the MessageBox functions is still a mystery.

thanks,

HyperEngineer
If it ain't broke, it probably needs improvement.