Deleting text from text frame only removes visible content, not overflow text

Hello All,

I am trying to delete text from a text frame using a custom function. However, the function only deletes the visible text inside the frame. There is still additional text present as overflow (indicated by the “+” icon at the bottom right of the text frame).

It seems like my code is only targeting the visible portion and not the entire content of the text frame.

Question:
How can I delete all the text from the text frame, including the overflow text?

What I’ve tried:
I have written a function to clear the text, but it only affects the visible content.

ErrorCode DeleteText(const UIDRef &textFrameUIDRef)
{
	ErrorCode status = kFailure;
	do{
		IDataBase* iDataBase = textFrameUIDRef.GetDataBase();
		if(!iDataBase)
			break;

		InterfacePtr<IGraphicFrameData> frame(textFrameUIDRef, UseDefaultIID());
		if(!frame)
			break;

		if(frame->GetTextContentUID() == kInvalidUID)
			break;

		InterfacePtr<IMultiColumnTextFrame> mcFrame(iDataBase, frame->GetTextContentUID(), UseDefaultIID());
		if(!mcFrame)
			break;

		InterfacePtr<ITextModel> iTextModel(iDataBase, mcFrame->GetTextModelUID(), UseDefaultIID());
		if(!iTextModel)
			break;
        TextIndex start = mcFrame->TextStart();
        int32 length = mcFrame->TextSpan() - 1;;

        if(length > 0)
            iTextModel->Delete(start,length);

 //       UID id = (GetNextThreadedTextFrameUID(textFrameUIDRef)).Get();
	}while(false);
	return status;
}

Thank You

Chetan