Text wildCard shows characters

Hello,

I made a simple project to test TouchGFX, when I move the slider I got error values, the initial value I’ve set in TouchGFX Designer is 25, so when I move the slider if the value contains 2 or 5 it will show with an other character

this is is my code:

void Screen1View::SliderChanged(int value)

{

unicode::snprintf(textArea1Buffer, TEXTAREA1_SIZE, “%d�?,value );

textArea1.setWildcard(textArea1Buffer);

textArea1.invalidate();

}