User and Reference Guide for the Intel® Fortran Compiler 14.0
This topic only applies to Windows* OS.
Intel® Fortran provides Fortran language elements (such as intrinsic procedures and statements) that conform to the Fortran Standard. Intel Fortran also provides language elements that are language extensions, including library routines.
The library routines provided by Intel Fortran:
Are intended to be called from the Fortran language. For example, character arguments are assumed to be Fortran character variables, not null-terminated C strings.
May have QQ appended at the end of their names to differentiate them from equivalent Windows operating system routines.
Are described in the Intel Fortran Language Reference online documentation, in the A to Z Reference. The routine description lists the appropriate USE statement needed to include the interface definitions, such as USE IFPORT.
Call appropriate Windows system API routines provided with the operating system.
Are specific to Windows systems, with one exception: most of the Intel Fortran Portability Library Overview routines exist on most Linux systems.
In contrast, the Windows API routines provided by the Windows operating system:
Are intended to be called from the C language. For example, character arguments are assumed to be null-terminated C strings.
Note that Intel Fortran provides interface block definitions that simplify calling Windows API routines from Intel Fortran (such as allowing you to specify Fortran data arguments as being passed by reference). To obtain these interface definitions, add the USE IFQWIN statement to your program.
Often have multiple words appended together in their names, such as GetSystemTime.
Are described in the Platform SDK online documentation. To look up a specific routine, use the Index or Search tabs in HTML Help viewer. The calling format is listed near the top of the page, followed by a description of the routine's arguments. The QuickInfo at the bottom of the Windows API routine documentation page lists the import library needed.
Are also specific to Windows operating systems.
There are many groups of Windows OS routines (see the Platform SDK and other resources). These routines provide sophisticated window management, memory management, graphics support, threading, security, and networking.
You can access many Windows API routines from any Fortran application, including Fortran Console and Fortran QuickWin applications. Only the Fortran Windows application Understanding Project Types provides access to the full set of Win32 routines needed to create GUI applications.
Fortran Console applications are text-only applications. Fortran QuickWin applications allow you to build Windows OS-style applications easily, but access only a small subset of the available Windows OS API features. (Fortran QuickWin applications also allow you to use graphics.)