Shape.Fill (Word)

Returns a FillFormat object that contains fill formatting properties for the specified shape.

Set myDocument = Documents(1) 
With myDocument.Shapes.AddShape(msoShapeRectangle, _ 
 90, 90, 90, 50).Fill 
 .ForeColor.RGB = RGB(128, 0, 0) 
 .BackColor.RGB = RGB(170, 170, 170) 
 .TwoColorGradient msoGradientHorizontal, 1 
End With