ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/cpguide/html/_gdiplus_types_of_coordinate_systems_about.htm
ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/cpref/html/frlrfSystemDrawingGraphicsUnitClassTopic.htm
ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/cpref/html/frlrfSystemDrawingGraphicsUnitClassTopic.htm
好象不对!