I am attempting to set the background color of the headder in an Excel spreadsheet using Office automation.

oSheet.Range("A1:AG2").Interior.Color = rgb(0,0,255)

should make the background blue. It doesn't. It makes a blue dot, speckled pattern instead. I simply want a solid blue background. I tried setting the pattern to solid and to none with the same effect.

oSheet.Range("A1:AG2").Interior.Pattern = 1 && Solid

Can anyone help me get a solid color background for a set of cells?