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Sonar blocks TextBox input in legacy VB6 programs

I have several VB6 programs I've written over the years and after a recent Norton update, Sonar blocks
input to a TextBox control as "Sonar.Heuristic.120".

In particular, the most recent program to trigger alerts uses the following methods of the TextBox:


It appears as if Norton is considering these events to be keylogger behavior however these are intrinsic functions
built into the control itself and provided by the VB6 runtime. As of now the only options are to disable Sonar completely or wait for the prompt and allow each program individually which is a hassle.

My current Norton version is:

Labels: SONAR