How do I use the MSVisualStudio 64bit compiler?

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Hi, I installed ROS melodic on windows 10 and try to compile a ROS package that I successfully used on ubuntu. I use Visual Studio 2015 but if it helps, I would switch to 2017 or 2019.

When I use catkin_make to build, the linker fails with the following error:

roscpp.lib(roscpp.dll) : fatal error LNK1112: Modul-Computertyp "x64" steht in Konflikt mit dem Zielcomputertyp "X86".
NMAKE : fatal error U1077: "C:\opt\rosdeps\x64\bin\cmake.exe": Rückgabe-Code "0xffffffff"
Stop.
NMAKE : fatal error U1077: ""C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe"": Rückgabe-Code "0x2"
Stop.
NMAKE : fatal error U1077: ""C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe"": Rückgabe-Code "0x2"
Stop.
Invoking "nmake" failed

This seems like I want to compile for x86 but the libraries are compiled for x64. As I run a 64bit machine and dlls for ROS and Qt are pre-compiled for x64, is there any way to use the x64 compiler of visual studio? I tried to run the command promt with following targets, but failed.

C:\Windows\System32\cmd.exe /k "C:\Program Files\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat" -arch=amd64 -host_arch=amd64 && c:\opt\ros\melodic\x64\setup.bat

Fails with The command "C:\Program" is either written wrong or could not be found.

C:\Windows\System32\cmd.exe /k "C:\PROGRA~1\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat" -arch=amd64 -host_arch=amd64 && c:\opt\ros\melodic\x64\setup.bat

Fails with The command "C:\Program" is either written wrong or could not be found.

C:\Windows\System32\cmd.exe /k "%ProgramFiles%\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat" -arch=amd64 -host_arch=amd64 && c:\opt\ros\melodic\x64\setup.bat

Fails with The command "C:\Program" is either written wrong or could not be found.

And as I run a German system: C:\Windows\System32\cmd.exe /k "C:\Programme\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat" -arch=amd64 -host_arch=amd64 && c:\opt\ros\melodic\x64\setup.bat

Fails with Access Denied.

How do I get to use the visual studio compiler for x64 target systems with catkin_make?

Or, if only that is possible, how do I get x86 ros (and qt) libraries to be able to link?

Or maybe I am missing something completely different?

Thank you in advance!