Does anyone have a good example on this 2 WIN32API function call?

Code:
Public Declare Function SetViewportExtEx Lib "gdi32" Alias "SetViewportExtEx" (ByVal hdc As Long, ByVal nX As Long, ByVal nY As Long, lpSize As SIZE) As Long

Public Declare Function SetViewportOrgEx Lib "gdi32" Alias "SetViewportOrgEx" (ByVal hdc As Long, ByVal nX As Long, ByVal nY As Long, lpPoint As POINTAPI) As Long