I need your help This is runtime error in GetDispInfo function.

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Hello
This is my Code

C++

class CContactList: public CListCtrl{..}


void CContactList::GetDispInfo(...){
   ...
   ...
   ...
   if(nItem > m_listContacts->GetCount()-1)  //  AAAAAAAA
      ...
}

Plz view AAAAAA

C++

CPtrArray *m_listContacts;  in *.h file

and I already formatted variable

C++

m_listContacts = &m_Array; // in other class

but m_listcontacts variable is NULL in GetDispInfo function.

plz help me.

Posted 16-Sep-14 22:17pm

Member 11074066

Updated 16-Sep-14 23:42pm

Nelek

v2

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George Jonsson 17-Sep-14 4:29am

What is the error you get?

Member 11074066 17-Sep-14 4:59am

error is memory error
"cannot access 0x00000005 in memory

Member 11074066 17-Sep-14 5:02am

Thank you for your time
I already used debugger
i checked in onInitDialog function
but it is NULL in GetDispInfo function

George Jonsson 17-Sep-14 5:46am

See Solution 1.
If m_listContacts is NULL it means that m_listContacts = &m_Array; is either not executed or you are using the same variable name in more than one class.
The debugger is your saver here.

Member 11074066 17-Sep-14 7:23am

Thanks
error is fixed

1 solution

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OriginalGriff · Accepted Answer · 2014-09-16T22:49:00

If your value is null, then it probably hasn't been set at all (or the value you are setting it to is null as well).

You probably need to check the code you use to set the m_listContacts: check that you are setting the right instance value, and not a new instance.

Look at that code first, and if it isn't obvious then use the debugger to check exactly what value yoiu are setting it to.

But we can't do that for you!