Exporting an .ai file to a bitmap file

In Illustrator Scripting (VBscripting), how can you export an ai file to a bitmap file?

In Illustrator you can open an ai file and by selecting the Export option you have a choice of formats and one of them is BMP.  How can this be done in scripting?  I did look at the AIExportType, but BMP is not in the list.

aiJPEG = 1

aiPhotoshop = 2

aiSVG = 3

aiPNG8 = 4

aiPNG24 = 5

aiGIF = 6

aiFlash = 7

aiAutoCAD = 8

I will also need to do this same method by Exporting to an eps file.

The task is the following:

When a client uploads an image file, we need to automatically export the file to bmp and to esp, thus having 3 files (original upload, bmp, and esp).  The file types that we are exporting, so far, will be ai, esp, and pdf (more to follow I am sure).

We also need to get information about each file.

Is it vector or a bitmap?

Color:  RGB, CMYK, or Pantone?

Is there text or curves or both?

What is the DPI resolution?

What is the image size?

Any help would be beneficial.

Thanks,

Tom