Modify deleteSelectionState of InsertTextOperation of TextOperationEvent possible?

Hi,
I have a spark textarea component listening to TextOperationEvent.CHANGING inside creationCompleteHandler.
text_area.addEventListener(TextOperationEvent.CHANGING, textChangingHandler);
What I want to do is when the user inputs "a" the InsertTextOperation text is changed to devanagari "अ" so the user effectively inputs "अ" by typing "a" on the keyboard. This is no problem and I get the result as expected using the code similar to below:
protected function textChangingHandler(e:TextOperationEvent):void {
     if (e.operation is InsertTextOperation) {
          var flowInsert:InsertTextOperation = e.operation as InsertTextOperation;
          var current_char:String = flowInsert.text.charAt(0);
          if (current_char == "a") {
               flowInsert.text = "अ";
Problem that I have been trying to figure out is next when the user again types "a", I want the text to change to "आ" replacing the previous "अ". Now, it looks like this can be achieved by using a variable to hold previous character typed, examine if it is "a", delete the previous "अ" using deleteSelectionState property of flowInsert(see above code) along with god knows what and, similarly(as above) replace the flowInsert.text with "आ".
How can this be achieved? I have tried manipulating the deleteSelectionState without result please help!!! Your help is deeply appreciated.
Thankyou,
Yalamber Tamot

Hi Frank,
For some reason I don't have the "write to data file" icon at left panel as one of my data targets. I found the document below and on page 3 it illustrates that I should have the PC icon as one of my data targets so I may write to file however it is not available. I am currently working in a APO version 4.1. Is there any way to add/create this similar to the way a BI source system is created?
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/20b22245-0828-2c10-54b1-a2ddb167df01
Regards,
David

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Modify deleteSelectionState of InsertTextOperation of TextOperationEvent possible?

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