Fortran language has high execution efficiency. It is widely used in the field of numerical calculation. And it has accumulated a lot of highefficient and reliable source codes. For example

The Microsoft IMSLFortran Library can give powerful mathematical and statistical analysis. VB.NET is a fully objectoriented language. Compared against VB language

VB.NET is quicker and easier to develop a more powerful Windows program. Mixedlanguage programming of VB.NET calling Fortran through dynamic link library mode is studied. It gives the corresponding calling method for variable

string

array

structure and structure array. Also the typical examples are offered. It provides technical support for the development of software with both advantages of Fortran and VB.NET: high execution efficiency and quick and easy development ability.