Hi all I have problem with linking my simple program... Problem is in line with conversion... I don't understand it :-( Hep me with this please... I'm using MS FPS 4.0 Thanks Pavel Houdek Output of linker> Linking... qwin.lib(qwkentry.obj) : error LNK2005: _WinMain@16 already defined in console.obj qwin.lib(qwkentry.obj) : error LNK2001: unresolved external symbol _main Debug/Input.exe : fatal error LNK1120: 1 unresolved externals Error executing link.exe. My program: integer function WinMain( hInstance, hPrevInstance, lpszCmdLine, nCmdShow ) !MS$ ATTRIBUTES STDCALL, ALIAS : '_WinMain@16' :: WinMain !To use win32 definitions use msfwin implicit none !Function parameters integer(4), intent(in) :: hInstance, hPrevInstance,nCmdShow,lpszCmdLine !Function returns and Window+Message Structure integer(4) :: iErr=0 real(8) :: nRead character (len=1024) :: szText="" read(szText, *, IOSTAT=iErr) nRead end