[c++] How can I solve the error LNK2019: unresolved external symbol - function?

I just ran into this problem in Visual Studio 2013. Apparently now, having two projects in the same solution and setting the the dependencies is not enough. You need to add a project reference between them. To do that:

  1. Right-click on the project in the solution explore
  2. Click Add => References...
  3. Click the Add New Reference button
  4. Check the boxes for the projects that this project relies on
  5. Click OK

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Examples related to lnk2019

How can I solve the error LNK2019: unresolved external symbol - function? Error LNK2019: Unresolved External Symbol in Visual Studio LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup