Help! CListCtrl access violation

I have used CListCtrl in the past with no problem, but in my current project I get an access violation.

I have traced it down to the face that the m_hWnd in not set. Trying to set it also results in an access violation.

I am able to create the column headers with no problem. It is when I perform an InsertItem that the error occurs. I have compared my implementation with what I had done in my previous project and it all looks the same.

Code:

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        m_PayoutSheet.SetExtendedStyle(m_PayoutSheet.GetExtendedStyle()|LVS_EX_HEADERDRAGDROP|LVS_EX_FULLROWSELECT|LVS_SHOWSELALWAYS|LVS_EX_GRIDLINES);

        m_PayoutSheet.InsertColumn(0,"Place",LVCFMT_LEFT,40,-1);
        m_PayoutSheet.InsertColumn(1,"Percentage",LVCFMT_LEFT,80,-1);
        m_PayoutSheet.InsertColumn(2,"Prize",LVCFMT_LEFT,50,-1);
        char PlaceT[255];
        char PercentageT[255];
        sprintf(PlaceT,"%d",Place);
        sprintf(PercentageT,"%d",Percentage);
        m_PayoutSheet.InsertItem(0,PlaceT);
        // Insert subitem for col 1
        m_PayoutSheet.SetItemText(1, 1, PercentageT);

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Update:

The column headers are created in OnInitDialog(). The InsertItem is in a seperate funtion.

A quick test just proved I was able to do an InsertItem inside OnInitDialog(). Not sure why that is, but I wanted to provide more info.

Where have you put this code ? Keep in mind that you cannot do this in the constructor of the window class.

Edit:

m_PayoutSheet.InsertItem(0,PlaceT);
// Insert subitem for col 1
m_PayoutSheet.SetItemText(1, 1, PercentageT);

I don't have my help handy, but if one of the 1s in SetItemText is the index of the item, shouldn't that be a zero ?

It is in a function called SavePayoutData().

The only thing weird about it is that is is called from another dialog. But I do the exact same thing in my other project with no problems.

There must be something wrong with the function. I am having problems with a CList in the same function, if I move it out, it works.