Ralf,
there is a main() function, and the project consists in a blank main.c file.
However, i forgot writing an important detail: the error was generated by the POLINK executable (the linker).
Sorry, but that part was obvious.
As Frankie also mentioned, you have a mismatch between selecting a Win GUI project but writing a console mode program.
If you select a "Win[32,64] program" from the "Empty projects" options, then the linker is looking for a
WinMain() function in main.c, while in a "Win[32,64] Console program", it will look for a
main() function.
ZIP the project in question (right click on the .EXE in the right hand project files window) and attach it to a post, then we can show you exactly where you are going wrong...
Ralf