Calling a function in Win32C++ Problem

I got 2 projects in one solution in Visual Studio C++. the first project is composed of functions such as Dirty Text Remover, Key Press Detector and Data Retriever. Then the second project is a window programming with a function that puts the window in the system tray whenever I minimize it.

My problem is this, how could i call the function from the first project to the second pr开发者_Go百科oject.

if the function code is in a header (.h/.hpp) file, just #include the header in the project that you want to call it from.