Hi,

There is some new functionality in recent arduino versions that I am implementing at the moment.

The change controls where the automatically generated prototypes are inserted.

Historically they have been inserted prior to the first line of code in the .ino which meant that methods that use types  need the types to be fined in a .h file.

However Visual Micro will not attempt to add a prototype if one already exists therefore you can probably add the prototype yourself ensuring that the type is defined first.

Notice in this example I have added the prototype "enStateFilippo foo(int iSerialValue);" before the method "RequestManagement()" and after the type "enStateFillipo" has been declared.

#define test123

enum enStateFilippo {
	enIdle, enReset

};
enStateFilippo _StateMachine = enIdle;


enStateFilippo RequestManagement(int iSerialValue);  //manually added prototype, signature must exactly match

enStateFilippo RequestManagement(int iSerialValue)
{

}

void setup()
{


}

void loop()
{


}
 

Finally the reason for the incorrect line numbers if that the error is in the auto generated prototypes which are not displayed in the code. Visual micro should show a better error