PFNLVGROUPCOMPARE callback function (commctrl.h)
The LVGroupCompare function is an application-defined callback function used with the LVM_INSERTGROUPSORTED and LVM_SORTGROUPS messages. It defines the ordering of the groups, based on the ID. The LVGROUPCOMPARE type defines a pointer to this callback function. LVGroupCompare is a placeholder for the application-defined function name.
Syntax
PFNLVGROUPCOMPARE Pfnlvgroupcompare;
int Pfnlvgroupcompare(
int unnamedParam1,
int unnamedParam2,
void *unnamedParam3
)
{...}
Parameters
unnamedParam1
Type: INT
The ID of the first group.
unnamedParam2
Type: INT
The ID of the second group.
unnamedParam3
Type: VOID*
A pointer to the application-defined information. This comes from the message that was called; for LVM_INSERTGROUPSORTED it is LVINSERTGROUPSORTED.pvData, and for LVM_SORTGROUPS it is the plv parameter.
Return value
Type: INT
Returns a negative value if the data for Group1_ID is less than the data for Group2_ID, a positive value if it is greater, or zero if it is the same.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | commctrl.h |