I am trying to use vmicro to program my stm32f103c8t6 "blue pill" boards. https://github.com/stm32duino Everything works flawlessly in the arduino IDE (1.8.12, 1.8.8 and 1.8.6) but when i use visual micro (with the IDE location set to any one of these 3 installs) It compiles, differently. One obvious difference is that the when compiling in Visual Studio, the compiler wont allow functions to be defined after void setup(), while in the Arduino IDE this is fine. And after making sure the functions are all defined in the right order, the code runs completely differently on the microcontroller when compiled in visual micro. Should there really be a difference in how VM and Arduino IDE compile code ?

Sorry, here is a  build log file attached. 

regarding the "with the IDE location set to any one of these 3 installs" I meant regardless of what installed version of Arduino IDE i point to in the "configure IDE locations" menu, i get the same behaviour. 

I have the latest version in program files, installed with installer, and i have the other two versions mentioned installed in other locations using the "ZIP file for non admin install" option on arduino.cc . I have these 3 versions because of compatibility issues in other projects, and to be able to have altered libraries specific to one of these versions.

First off, thanks for the swift and helpful responses! 

I downloaded the latest update and presto, it seems to have completely fixed the problem! Compiled code behaves as it should on the microcontroller, and now I can define functions wherever the heck i want in the code. 

On a related note, though it doesn't seem to be affecting how the codecompiles and runs, I am getting an intellisense error : static_assert(sizeof(JoystickReport_t)==13, "Wrong endianness/packing!"); 
tracked down this thread that suggests the compiler needs to have "C99 support" enabled. 

dunno if this can or should be fixed..