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Defines the prototype for the compare function used by DPA_Sort and DPA_Search.
Syntax
typedef int ( CALLBACK *PFNDPACOMPARE)(
_In_opt_ void *p1,
_In_opt_ void *p2,
_In_ LPARAM lParam
);
Parameters
p1 [in, optional]
Type: void*A pointer to the first item in the comparison.
p2 [in, optional]
Type: void*A pointer to the second item in the comparison.
lParam [in]
Type: LPARAMAdditional data passed to pfnCmp.
Return value
Type: int
The meaning of the return values depends on the function that uses this callback prototype.
The return values for DPA_Sort are as follows.
| less than 0 | If p1 should be sorted ahead of p2. |
| equal to 0 | If p1 and p2 should be sorted together. |
| greater than 0 | If p1 should be sorted after p2. |
The return values for DPA_Search are as follows.
| less than 0 | If p1 should be found ahead of p2. |
| equal to zero | If p1 and p2 should be found together. |
| greater than 0 | If p1 should be found after p2. |
Remarks
As of Windows Vista, this function is merely an alias for PFNDACOMPARE.
Requirements
Minimum supported client |
Windows Vista [desktop apps only] |
Minimum supported server |
Windows Server 2003 [desktop apps only] |
Header |
Commctrl.h |