How to compile and link fortran programs under Windows NT with Digital Fortran 6.0 (Only for older versions than 2.7) ?

14 How to compile and link fortran programs under Windows NT with Digital Fortran 6.0 (Only for older versions than 2.7) ?

Include the attribute "dllexport" in the source file of the fortran program and specify the name of the exported file.

Example: The file essai.f contains
```
      SUBROUTINE ESSAI(X)
      !DEC$ ATTRIBUTES DLLEXPORT :: ESSAI
C
      DOUBLE PRECISION X(*)
C
```
...
Create a project of type "Win32 Dynamic-Link Library" (call it for example proj) with option "empty DLL project".
Include essai.f in proj.
Modify Project Settings as follows: Select Fortran and in the category "External Procedures", define the "Argument passing convention" as "C, By Reference". Also select "Append Underscore to External Names" option. The resulting "Project Options" (generated automatically) is
```
/assume:underscore /check:bounds /compile_only
/debug:full /iface:cref /include:"Debug/" /libs:dll
/nologo /warn:argument_checking /warn:nofileopt /module:"Debug/"
/object:"Debug/" /pdbfile:"Debug/DF60.PDB" /dll
```
Compile essai.f and build the project proj. This creates the file proj.dll
To link this routine incrementally in Scilab place proj.dll in the current directory and do a link. This should be the result:

-->link("proj.dll","ESSAI") Linking ESSAI (in fact ESSAI_) Link done ans = 0.