I have an Arduino c/c++ program that I have revised files with multiple classes into a separate file for each class. In addition, I've renamed using a prefix for each file. When I try to compile I get a remote Linux login. I've installed WSL, however, when I try to login there is a red box around Host name and port. I've also tried 23 in place of 22 (found article in Stack Overflow). How do I find the correct port number? Why is it not recognizing the VM name? Using VS2022.

I keep all of my Visual Studio projects on a separate drive to keep the VS clutter off the C drive. Then use BC4 to update the Documents\Library\project when using the Arduino IDE to compile.
When I create a new project with vMicro, the menus are present and the project was created in Documents\Library\'project'.
When I move the project to my VS drive, update the solution file, the vMicro menu are not present and will not show. 
Does vMicro only work with Documents\Library? 
I just switched the visibility to 'Manual All', menus are visible,  however, the build button is gray. ???

I keep all solutions in a 'board type' folder. The solution name is the project name with a prefix of 'sln_'. The 'Solution' folder contains the project folder, .vs folder, the .sln file, and the .sln.DotSettings.user file. The 'Project' folder contains the .vcxproj file, the .vcxproj.filters file, the .vcxproj.user file, an __vm folder, a bin folder, an obj folder, and an scr folder. The scr folder contains the  .h, .c, .hpp, .cpp files, and a folder with the 'Project' name which contains the 'Project'.ino file.
The only item that does not match is the solution name. 

Starting over.
VS2022(without code)->vMicro->New Arduino project->GrblMega-2023_08_08.
Created in  Documents\Arduino, however, not in Documents\Arduino\Library\ as GrblMega_2023_08_08 (note - changed to _).
VS2022->renamed solution from GrblMega_2023_08_08 to sln_GrblMega-2023_08_08, project from GrblMega_2023_08_08 to GrblMega-2023_08_08, GrblMega_2023_08_08.ino to GrblMega-2023_08_08.ino. Deleted .GrblMega_2023_08_08.vsarduino.h, left behind .GrblMega-2023_08_08.vsarduino.h.
Renamed Documents\Arduino\GrblMega-2023_08_08 folder to sln_GrblMega-2023_08_08, sub folder GrblMega_2023_08_08 to GrblMega-2023_08_08, changed sub folder GrblMega_2023_08_08 items to GrblMega-2023_08_08.
Edited sln_GrblMega-2023_08_08.sln-> changed GrblMega_2023_08_08 items to GrblMega-2023_08_08.
Documents\Arduino\sln_GrblMega-2023_08_08\GrblMega-2023_08_08-> __vm, bin, obj, src, GrblMega-2023_08_08.ino, GrblMega-2023_08_08.vcxproj, GrblMega-2023_08_08.vcxproj.filters.
Cut Documents\Arduino\sln_GrblMega-2023_08_08 folder, pasted to VisualStudio\GrblMega\
Using GrblMega-2023_08_08.vcxproj into VS2022.
Renamed solution from GrblMega-2023_08_08 to and saved .sln to VisualStudio\GrblMega\sln_GrblMega-2023_08_08 folder.
Using BC4, copied saved src files to this project src.
Right click the project-> click Add-> click Existing item-> selected src items.
Right click the project-> click Add-> click Existing item, navigated to src\GrblMega-2023_08_08 folder-> selected GrblMega-2023_08_03.ino.
Project now has header file, source files, and GrblMega-2023_08_03.ino.
vMicro build button is gray.

sln_GrblMega-2023_08_08 folder
sln_GrblMega-2023_08_08\sln_GrblMega-2023_08_08.sln
sln_GrblMega-2023_08_08\GrblMega-2023_08_08 folder
sln_GrblMega-2023_08_08\GrblMega-2023_08_08\GrblMega-2023_08_03.ino (missing-> copied from src\GrblMega-2023_08_08 folder)
sln_GrblMega-2023_08_08\GrblMega-2023_08_08\src\ .c, .h, .cpp, .hpp

.GrblMega-2023_08_08.vsarduino.h contains #include "..\GrblMega-2023_08_08.ino". I assume that is from the src directory.

Build button now available.
Confirmed the same errors as Arduino IDE:
error: initializer element is not constant item was declared as const.
error: unknown type name 'class'; in five(5) .hpp files of ten (10) .hpp files that declare a class.

OK. I started over without the '_' to '-' renaming.
Used BC4 to copy the files.
Used the 'Show All Files' and selected all and 'Included In Project'.
Build button was gray.
Had to copy .ino to project folder to get the build button.
still getting the following errors:
error: initializer element is not constant item was declared as const.
error: unknown type name 'class'; in five(5) .hpp files of ten (10) .hpp files that declare a class.