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How to Add an Item to a Header Control

  • Article

This topic demonstrates how to add an item to a header control. A header control typically has several header items that define the columns of the control. You can add an item to a header control by sending the HDM_INSERTITEM message to the control.

What you need to know

Technologies

Prerequisites

  • C/C++
  • Windows User Interface Programming

Instructions

Use the HDM_INSERTITEM message to add an item to the header control. The message must include the address of an HDITEM structure. This structure defines the properties of the header item, which can include a string, a bitmapped image, an initial size, and an application-defined 32-bit value.

The following example illustrates how to use the HDM_INSERTITEM message and the HDITEM structure to add an item to a header control. The new item consists of a string that is left-justified within the item rectangle.

// DoInsertItem - inserts an item into a header control. 
// Returns the index of the new item. 
// hwndHeader - handle to the header control. 
// iInsertAfter - index of the previous item. 
// nWidth - width of the new item. 
// lpsz - address of the item string. 
int DoInsertItem(HWND hwndHeader, int iInsertAfter, 
    int nWidth, LPTSTR lpsz) 
{ 
    HDITEM hdi; 
    int index; 
 
    hdi.mask = HDI_TEXT | HDI_FORMAT | HDI_WIDTH; 
    hdi.cxy = nWidth; 
    hdi.pszText = lpsz; 
    hdi.cchTextMax = sizeof(hdi.pszText)/sizeof(hdi.pszText[0]); 
    hdi.fmt = HDF_LEFT | HDF_STRING; 
 
    index = SendMessage(hwndHeader, HDM_INSERTITEM, 
        (WPARAM) iInsertAfter, (LPARAM) &hdi); 
 
    return index; 
}

About Header Controls

Header Control Reference

Using Header Controls