The HD_ITEM structure contains information about an item in a header control.
typedef struct _HD_ITEM { hdi
UINT mask;
int cxy;
LPTSTR pszText;
HBITMAP hbm;
int cchTextMax;
int fmt;
LPARAM lParam;
} HD_ITEM;
Members
mask
Mask flags that indicate which of the other structure members contain valid data. This member can be a combination of the following values:
| Value | Meaning |
| HDI_BITMAP | The hbm member is valid. |
| HDI_FORMAT | The fmt member is valid. |
| HDI_HEIGHT | The cxy member is valid and specifies the height of the item. |
| HDI_LPARAM | The lParam member is valid. |
| HDI_TEXT | The pszText and cchTextMax members are valid. |
| HDI_WIDTH | The cxy member is valid and specifies the width of the item. |
cxy
Width or height of item.
pszText
Pointer to item string.
hbm
Handle to item bitmap.
cchTextMax
Length of item string, in characters.
fmt
A set of bit flags that specify the item's format.
This member can include one of the following text justification or right-to-left reading order bit flags:
| Value | Meaning |
| HDF_CENTER | Centers the contents of the item. |
| HDF_LEFT | Left aligns the contents of the item. |
| HDF_RIGHT | Right aligns the contents of the item. |
| HDF_RTLREADING | Displays text using right-to-left reading order on Hebrew or Arabic systems. |
The preceding value is combined with one of the following values:
| Value | Meaning |
| HDF_BITMAP | The item displays a bitmap. |
| HDF_OWNERDRAW | The owner window of the header control draws the item. |
| HDF_STRING | The item displays a string. |
You can use the HDF_JUSTIFYMASK mask to isolate the text justification portion of the fmt member.
lParam
Application-defined item data.