摘要：
This example implements a simple tool for rotating graphics.Dim m_pRotateTracker As IRotateTrackerDim m_pSelElem As IElementPrivate Sub UIToolControl1_Select() Set m_pRotateTracker = New RotateTrackerEnd SubPrivate Function UIToolControl1_Deactivate() As Boolean If Not m_pRotateTracker Is Nothing .. 阅读全文