highlights all cells that contain a capital letter A
Sub FormatContainsA()
With Selection
.FormatConditions.Delete
.FormatConditions.Add Type:=xlTextString, String:="A", _
TextOperator:=xlContains
' other choices: xlBeginsWith, xlDoesNotContain, xlEndsWith
.FormatConditions(1).Interior.Color = RGB(255, 0, 0) End With End Sub