Thanks, I found the file now (Windows Search didn't) and added the bin folder to the %Path% variable, but unfortunately I am still getting the error message "The application could not be started, because PocoFoundation.dll was not found" when I click on release.
Since I am using one of the included examples, the project settings should be correct, I only corrected the paths (with my own code I am getting the same error).
In the tutorial it was not mentioned to add the location of the PocoFoundation.dll to the project settings - do I have to include the .dll or the path to the bin directory in the project settings ?
Aditionally, I copied the PocoFoundation.dll to Windows\system32 with no effect, then used Dependency Walker (for the Mail.exe but it is quite the same for the other examples), which gave me the following result:
... (even more statements that I don't understand)