How to set .vcxproj to let MSBuild compile a dll - c++

Question

Above All
To save your time from reading a lot, Thanks to CristiFati and here is the answer:
If you use "Library" in "ConfigurationType" like me, you'll get an .obj file instead of .dll.
The right keyword is "DynamicLibrary" instead of "Library". That is:
<ConfigurationType>DynamicLibrary</ConfigurationType>
Then you'll have the .dll you want.
[supplement] From CMake Documents, thanks to Botje's guiding, it appears that a "Library" is actually like a sub-directory under the root project. Thus it's different with how dll work.
Short Story:
I need to compile a dll with MSbuild, without any IDE.
I followed instruction on Microsoft Doc to create app build project.
No webpage indicates how to create dll build project is found yet. Thus I edit .vcxproj according to similar google info.
BUILD SUCCESS!
But the result only contain a .obj file. No dll in sight.
Need help about how to modify a .vcxproj to build a dll.
Detailed Story:
I need to compile a dll.
My company didn't buy any commercial license thus I cannot use any IDE for this.
However MSBuild is safe to use.
I'm following this page to create a C++ project which could be compiled with MSBuild only.
https://learn.microsoft.com/en-us/cpp/build/walkthrough-using-msbuild-to-create-a-visual-cpp-project?view=vs-2017
You don't need actually read that page because I'll paste the project file below.
First, Following that page, I got this application type project file
<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup>
<ProjectConfiguration Include="Debug|Win32">
<Configuration>Debug</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.default.props" />
<PropertyGroup>
<ConfigurationType>Application</ConfigurationType>
<PlatformToolset>v141</PlatformToolset>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ItemGroup>
<ClCompile Include="helloworld.cpp" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="helloworld.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Targets" />
</Project>
I tested the build. And got my .exe file successfully. And my helloworld.exe printed "HelloWorld" as predicted. Then...
Second, Following this page:
https://learn.microsoft.com/en-us/cpp/build/walkthrough-creating-and-using-a-dynamic-link-library-cpp?view=vs-2017
I'm sure the header and cpp file is good to go
#pragma once
#ifdef HELLOWORLD_EXPORTS
#define HELLOWORLD_API __declspec(dllexport)
#else
#define HELLOWORLD_API __declspec(dllimport)
#endif
extern "C" HELLOWORLD_API void helloworld();
Third, Switch this project from application mode to library mode...
Actually I'm not sure how to do this. So I googled some info and try to do what they did.
I change the Debug mode to Release mode.
Then change the Application output to Library.
<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup>
<ProjectConfiguration Include="Release|Win32">
<Configuration>Release</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.default.props" />
<PropertyGroup>
<ConfigurationType>Library</ConfigurationType>
<PlatformToolset>v141</PlatformToolset>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ItemGroup>
<ClCompile Include="helloworld.cpp" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="helloworld.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Targets" />
</Project>
Finally, I let msbuild do its work:
msbuild helloworld.vcxproj /p:configuration=Release
And the build is success!
But when I head to Release folder under my root directory, I find only a "helloworld.obj" file and a "vc141.pdb" along a folder names "helloworld.tlog".
Well this is not right. I think the right result will be a "helloworld.dll" in here.
So, that should be my .vcxproj file's problem I guess.
So, could anybody kindly give a guide for creating a dll project from scratch?
Thanks!

Answer 1

Although using the IDE is prohibited by licensing purposes, listing [MS.Docs]: Walkthrough: Create and use your own Dynamic Link Library (C++) anyway.
The keypoint is:
3. From the filtered list of project types, select Dynamic-link Library (DLL), and then choose Next.
Behind the scenes, that maps to: [MS.Docs]: ConfigurationTypes Enum:
Fields
typeApplication             1      Application (.exe)
typeDynamicLibrary      2      Dynamic Library (.dll)
typeGeneric                 10      Makefile, displays makefile toolset (NMake)
typeStaticLibrary           4      Static Library (.dll)
typeUnknown                0      Utility
Translated to .vcxproj structure, the ConfigurationType node:
<ConfigurationType>Application</ConfigurationType>
should be converted to:
<ConfigurationType>DynamicLibrary</ConfigurationType>
But, as (#Botje's) comments rightly pointed out, you should move towards free build tools (there are a number of alternatives, and CMake seems to be the best one).