Imagehlp.dll is part of the Win32 API (see c:\Windows\system32). It’s typically used for debugging, but even if you turn off all debugging features when you compile, there is still a dependency on this dll. It’s used if/when your code crashes. You can delay loading this library so that it doesn’t get loaded until your code needs it. I’d recommend looking at the compiling instructions for the FAST v7.02 LabVIEW interface (see UsingFAST4LabVIEW.pdf), which indicates compiling options necessary for delay-loading this library.