Use the Split function.


VB Code:
  1. Private Sub Command1_Click()

  2.     Dim Coords As String

  3.     Dim vArray As Variant

  4.     

  5.     Coords = "1024,768"

  6.     

  7.     vArray = Split(Coords, ",")

  8.     

  9.     MsgBox vArray(0) & vbCrLf & vArray(1)

  10. End Sub