Declaration
property ObjLeft[hobj: integer]: integer;
Description
Specifies the left offset of 
hobj object. The coordinates are in pixels with zoom = 100%.
When setting ObjLeft, ObjRight is also moved to maintain the original object width.
hobj is the ID of the object. You can also specify IEV_NEXT_INSERTED_OBJECT (-1) which refers to the next object to be inserted or IEV_PREVIOUS_INSERTED_OBJECT (-2) for the last object inserted.
// This code creates a Box at 10, 10 of 50x50 pixels.
ImageEnVect1.ObjKind  [IEV_NEXT_INSERTED_OBJECT] := iekBOX;
ImageEnVect1.ObjLeft  [IEV_NEXT_INSERTED_OBJECT] := 10;
ImageEnVect1.ObjTop   [IEV_NEXT_INSERTED_OBJECT] := 10;
ImageEnVect1.ObjWidth [IEV_NEXT_INSERTED_OBJECT] := 50;
ImageEnVect1.ObjHeight[IEV_NEXT_INSERTED_OBJECT] := 50;
ImageEnVect1.AddNewObject();
Transition Information
If you are transitioning your code to 
TImageEnView Layers, instead of ObjLeft, use: 
TIELayer.PosX
ImageEnView1.CurrentLayer.PosX := 0;
ImageEnView1.Update();