This example sets the number of tabs in a RichTextBox control to a total of five and then sets the positions of the tabs to multiples of five. To try this example, put a RichTextBox control and a CommandButton control on a form. Paste this code into the Click event of the CommandButton control. Then run the example.
Private Sub Command1_Click()
With RichTextBox1
.SelTabCount = 5
For X = 0 To .SelTabCount - 1
.SelTabs(X) = 5 * X
Next X
End With
End Sub