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LVM_SORTITEMS Overview  Group

The LVM_SORTITEMS message uses an application-defined comparison function to sort the items of a list view control. The index of each item changes to reflect the new sequence. You can send this message explicitly or by using the ListView_SortItems macro.

LVM_SORTITEMS 

wParam = (WPARAM) (LPARAM) lParamSort; 

lParam = (LPARAM) (PFNLVCOMPARE) pfnCompare; 

 

Parameters

lParamSort
Application-defined value that is passed to the comparison function.
pfnCompare
Pointer to the application-defined comparison function. The comparison function is called during the sort operation each time the relative order of two list items needs to be compared.

Return Values

Returns TRUE if successful or FALSE otherwise.

Remarks

The comparison function has the following form:

int CALLBACK CompareFunc(LPARAM lParam1, LPARAM lParam2, 

    LPARAM lParamSort); 

 

The lParam1 parameter is the 32-bit value associated with the first item being compared; and the lParam2 parameter is the value associated with the second item. These are the values that were specified in the lParam member of the itemsí LV_ITEM structure when they were inserted into the list. The lParamSort parameter is the same value passed to the LVM_SORTITEMS message.

The comparison function must return a negative value if the first item should precede the second, a positive value if the first item should follow the second, or zero if the two items are equivalent.

See Also

ListView_SortItems, LV_ITEM


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