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TVSORTCB structure (commctrl.h)

  • Makale

Contains information used to sort child items in a tree-view control. This structure is used with the TVM_SORTCHILDRENCB message. This structure is identical to the TV_SORTCB structure, but it has been renamed to follow current naming conventions.

Syntax

typedef struct tagTVSORTCB {
  HTREEITEM    hParent;
  PFNTVCOMPARE lpfnCompare;
  LPARAM       lParam;
} TVSORTCB, *LPTVSORTCB;

Members

hParent

Type: HTREEITEM

Handle to the parent item.

lpfnCompare

Type: PFNTVCOMPARE

Address of an application-defined callback function, which is called during a sort operation each time the relative order of two list items needs to be compared.

lParam

Type: LPARAM

Application-defined value that gets passed as the lParamSort argument in the callback function specified in lpfnCompare.

Remarks

The callback function specified by lpfnCompare has the following form:


int CALLBACK CompareFunc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort);

The callback 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.

The lParam1 and lParam2 parameters correspond to the lParam member of the TVITEM structure for the two items being compared. The lParamSort parameter corresponds to the lParam member of this structure.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Header commctrl.h