Hallo, please i need help.
I am using Atmel Studio, Arduino 1.5.8 + 1.0.6, and the Visual Micro addin. On compiling .ino files i will get the following Errors: 
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Compiling 'pulse-to-pulse' for 'Arduino Duemilanove w/ ATmega328'
core.a(main.cpp.o)*:In function `main'
main.cpp:undefined reference to `setup'
main.cpp:undefined reference to `loop'
Error creating .elf
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This happens to all .ino files. I down loaded both Arduino and a new Addin. After installing i got the same Problem.
Regards wernerP. 

Hi,

Thanks for sending the sketch. I think the issue is probably the dashes in the sketch name. 

Arduino historically only allows alpha and numeric chars in sketch names and must not start with numeric.

These rules are changing for newer Arduino hardware and tool chains however it's safe to stick with simple names for now.

If you open the sketch in Atmel Studio then right click the .INO name and click rename, then Visual Micro should handle the renaming of the folder and project for you. 

Thanks

General Note

Remember that Arduino sketches must be in a folder with the same name and for Visual micro the atmel studio project must also have the same name.