Save PDF of specific sheet in drawing...

Hi, I need to create a pdf of a drawing, my code now is:

myDRW.SaveAs3 FilePath & FileName & "_DRW.pdf", 0, 0  'save pdf of drw

But, when I have more than one sheet in my drawing, sometimes, it runs silently (and exports all drawing sheets into pdf), or other times, it pops up a little window, prompting me which sheets I'd like to export.

I haven't been able to find a way to specify which sheet to export as pdf through API.

Can someone shine some light please?

I tried recording a macro of me doing a SaveAs and when that little box poped up prompting me what sheets to save, I selected the first only, but the macro really only recorded the saveas3 function call.

Note: My goal here, is to just save a pdf of the first sheet for any drawing. Also, below is a snap-shot of the little pop-up window I get (only pops-up sometimes when running code, but when saving as manually, it's consistent).

Thanks in advance

SolidworksApi macros