Annotation problem

[User (Legacy)]

I want to put a label just to the left of the labels on the x-axis. 

I have decided I need not to attach it to anything but to determine the 

location of the origin in pixels  programmatically and then locate it a 

little below and to the left of that spot. 

to get the location in pixels of the origin, I have used: 

 Chart1a.ValueToPixel 1,80,x,y,AXIS_Y 

I am using VB script.  I keep getting data mismatch error. 

Thank you in advance.