The spin control is usually used to increment a quantity by a fixed step. This step can be set using the IncrAccelarator property.
The Spinner control can be paired with an edit control (called a buddy control) which must be the next control in the tab order. The buddy control will automatically update according to the number of clicks of the spinner control, provided the EditBuddy property is set to True.
The normal properties supported are:
Bottom, CursorPointer, DecimalBase, EditBuddy, Enable, FlexHorizontal, FlexVertical, Group, Height, IncrAccelarator, Layer, Left, Maximum, Minimum, NavigateSource, NavigateTarget, Orientation, Right, Tabstop, Tag, Top, ValueID, Visible, Width, WrapAround.
For more information, click 
The events supported are:
EventChange, EventDblClick, EventDragDrop, EventDragOver, EventInitialise, EventMouseDown, EventMouseMove, EventMouseUp, EventPumpData.
For more information, click
The methods supported are:
ConvertToNavData, GetDlgCtrlID, Invalidate, LayerName, Move, Navigate, NavigateEx, RunChange, RunInitialize, RunPumpData, SetFocus.
For more information, click