add custom DLL search path when application startup( Visual Studio 2017 )

Hi. I'm racking my brain trying to come up to a DLL load problem. I created empty qt application( no any feature ) that statically links to other lib files which load DLLs. I'd like to have some DLLs in another folder other than the folder that the executable is in. Something like %working_folder%\plugins - I'd rather not have dozens (yes ... dozens) of DLLs in my %working_folder%. I'm trying to solve something that is part of the main app that will adjust the search path @ startup. The problem I'm running into is that this new custom DLL path isn't in the system search path. When I start the app it crashes (STATUS_DLL_NOT_FOUND) because the necessary DLLs are not in the appropriate places. What I'd like to do is to check @ startup if this DLL folder is in the process environment variable search path and if not add it. Problem is, the application attempts to load all these DLLs before the app executes one line of code. I dont' want run from bat file. If you can fix this issue, please send me invitation. Please refer following links [login to view URL] I attach the source code with dll issue. [login to view URL] - visual studio 2017 - qt 5.14.2