Drawing a cross hair

Hi everyone,

I started scripting VB for the first time ever, as part of my project in Corel PhotoPaint. I am trying to write code to draw 2 lines as part of a crosshair.
So far I have successfully extracted the coordinates (x1,y1,x2,y2) and (x3,y3,x4,y4) from a textfile as part of the procedure in the module.

I want to use these coordinates to draw 2 lines (as objects), with the above-mentioned coordinates on to the background image. This is the code I have tried to use:

Call Application.CorelScript.LineTool(3, 0, 0, 0, 0, 0)
Call Application.CorelScript.StartDraw(x1, y1, 0, 0, 0, 0)
Call Application.CorelScript.ContinueDraw(x2, y2, 0, 0, 0, 0)
Call Application.CorelScript.EndDraw

Call Application.CorelScript.LineTool(3, 0, 0, 0, 0, 0)
Call Application.CorelScript.StartDraw(x3, y3, 0, 0, 0, 0)
Call Application.CorelScript.ContinueDraw(x4, y4, 0, 0, 0, 0)
Call Application.CorelScript.EndDraw

However, the macro terminates at line 2 of the code above (the startdraw line). The error message is:
Run-time error 1002: You need an open document for this operation

It says this, even though the image I want to work with is already open :?
Any ideas on how I can solve this problem?

Thank you all in advance.