Search for the desired text with the at() function. This will give you the position (in characters), which you can then use with TextBox.SelStart.
>my msample text in editbox
>
>7: 0 Bus.Obj. Element set: PatientMedicareCardNum 2265388264
>7: 0 Bus.Obj. Element set: PatientReferenceNum 1
>7: 0 Bus.Obj. Element set: DateOfService 10082005
>7: 0 Bus.Obj. Element set: ReferralPeriodTypeCde S
>7: 9202 Bus.Obj. Element set: ReferringProviderNum 9202 Invalid value for data item. The data element does not comply with the values permitted or has failed a check digit check.
>7: 0 Bus.Obj. Element set: ReferralIssueDate 31012005
>6: 0 Business Object set: Service ./'01'/'AB01'
>7: 0 Bus.Obj. Element set: ItemNum 18240
>7: 0 Bus.Obj. Element set: ChargeAmount 5955
>
>i need to highlight the row contains no 9202
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)