IGeometryProject メソッドの使用方法

Private Sub ProjectCoordinates()
    Dim pSpatialReferenceFactory As ISpatialReferenceFactory
    Set pSpatialReferenceFactory = New SpatialReferenceEnvironment
 
    '変換前の空間参照（地理座標系：WGS1984）
    Dim pGeographicCoordinateSystem As IGeographicCoordinateSystem
    Set pGeographicCoordinateSystem = pSpatialReferenceFactory.CreateGeographicCoordinateSystem(esriSRGeoCSType.esriSRGeoCS_WGS1984)
 
    '変換後の空間参照（投影座標系：WGS1984 メルカトル）
    Dim pProjectedCoordinateSystem As IProjectedCoordinateSystem
    Set pProjectedCoordinateSystem = pSpatialReferenceFactory.CreateProjectedCoordinateSystem(esriSRProjCS_World_Mercator)
 
    Dim pPoint As IPoint
    Set pPoint = New point
 
    Set pPoint.SpatialReference = pGeographicCoordinateSystem   'SpatialReferenceの定義
    pPoint.X = 139.61425781
    pPoint.Y = 35.53222623
 
    Debug.Print "変換前", pPoint.SpatialReference.Name, "X : " & pPoint.X, "Y : " & pPoint.Y
 
    pPoint.Project pProjectedCoordinateSystem    '投影変換
 
    Debug.Print "変換後", pPoint.SpatialReference.Name, "X : " & pPoint.X, "Y : " & pPoint.Y
 
End Sub