Arduino for STM32

Thank you so much, now it's working

Hello

my name is Marcus and I am pretty new to this complete "Blue Pill Thingy" :)
I'm trying to make the Arduino Bounce2 Lib run, without any success. :?

C:\Users\m_kor\Documents\Arduino\libraries\Bounce2\Bounce2.cpp: In member function 'void Bounce::attach(int, int)':

C:\Users\m_kor\Documents ...