I have a problem with invalid characters finding. that is, Im using "ABCD" font with my document, after some time i want to change "DCBA" font, procedure im using is selet all the text and changed to "DCBA" font. Here some of the characters not found in the incoming("DCBA") fonts then it is highlight in different color. I want to find those highlighted invalid characters.
Is there any idea regarding this, should be appreciated.