To specify multiple selection criteria, declare an array containing enough elements to represent each criterion, and assign each criterion to an element.
The following code specifies two criteria: the object must be a circle and it must reside on layer 0. The code declares FilterType and FilterData as arrays of two elements, and assigns each criterion to an element:
Sub Ch4_FilterBlueCircleOnLayer0() Dim sstext As AcadSelectionSet Dim FilterType(1) As Integer Dim FilterData(1) As Variant Set sstext = ThisDrawing.SelectionSets.Add("SS4") FilterType(0) = 0 FilterData(0) = "Circle" FilterType(1) = 8 FilterData(1) = "0" sstext.SelectOnScreen FilterType, FilterData End Sub