Controlling Raster Manager with VBA

I'm new to Microstation and average with VBA and VB.

From Bentley Microstation XM edition I can select "File", "Raster Manager" and then select the file by clicking on it.  After that I click on the "invert" button at the bottom of the raster manager screen.  I have several files to do this to and would like to automate the process with VBA.  I tried recording a macro, however, the Microstation XM VBA code seems to "loose control" once the raster manager is activated.

1.  Suggestions on how to automate the process?

2.  What is the VBA code to accomplish this?

Thanks in advance,

Christmas May