How many virtual pins are there?

[Gunner]

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Defining virtual pins as constants

Quick question: is it possible to define a virtual pin using #define or const so I don’t have to manually change or find and replace all instances of a vpin? I do this for I/O pins to reduce bugs and errors, as having ‘magic numbers’ in code is generally a bad idea. I tried #define BUTTON_PIN and const uint8_t BUTTON_PIN but both of these styles made my project stop working. Is there some adjustment I can make or is this not possible with Blynk? Cheers.