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CHeaderCtrl::InsertItem

Inserts a new item into a header control at the specified index.

int InsertItem( 
   int nPos, 
   HDITEM* phdi  
);

nPos

The zero-based index of the item to be inserted. If the value is zero, the item is inserted at the beginning of the header control. If the value is greater than the maximum value, the item is inserted at the end of the header control.

phdi

Pointer to an HDITEM structure that contains information about the item to be inserted.

Index of the new item if successful; otherwise – 1.

CString str;
HDITEM  hdi;

hdi.mask = HDI_TEXT | HDI_WIDTH | HDI_FORMAT | HDI_IMAGE;
hdi.cxy = 100; // Make all columns 100 pixels wide.
hdi.fmt = HDF_STRING | HDF_CENTER;

// Insert 6 columns in the header control. 
for (int i=0; i < 6; i++)
{
   str.Format(TEXT("column %d"), i);
   hdi.pszText = str.GetBuffer(0);
   hdi.iImage = i % 3;

   m_myHeaderCtrl.InsertItem(i, &hdi);
}

Header: afxcmn.h

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