usDetentPos (USHORT)

Detent position.

Number of pixels the detent is positioned from home.

ulReserved (ULONG)

Reserved value, should be 0.

ulDetentId (ULONG)

Detent ID.

Unique identifier for the detent being added to the slider. If 0 is returned, an error occurred. The WinGetLastError function may return the following errors:

• PMERR_HEAP_MAX_SIZE_REACHED 
  PMERR_PARAMETER_OUT_OF_RANGE.

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