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How mixed FPS4.0 with VB?

How mixed FPS4.0 with VB?

How mixed FPS4.0 with VB?

(OP)
Dear Sir
I want to create user interface to my fortran program in vb,but I not able ,according following procedure which I consider for sample program:(my program written by fortran power station 4.0 and  also my vb version
is 4.0 or 6.0)

** To create a vb interface
1- Add a command button and Text box to form
2-Add the Following Vb code for command button:

Static arr(1 To 5) As stringarray
Call fortarra(arr(1))
For I% = 1 To 5
Text1.Text = arr(I%).strings + Chr$(13) + _
Chr$(10) + Text1.Text
Next I%

3-Save form and project by extension name of .frm & .vbp
4-Add the following code for module wich creat in my project:

Type stringarray
strings As String * 24
End Type
Declare Sub fortarra Lib "c:\vb4\fg.dll" (myarray As stringarray)

5- save the module name of module.bas

***To create the Fortran subroutine
1-Write the fortran code:

subroutine fortarra(arr)
character(24) arr(5)
arr="This is a string from Fortran."
end subroutine

2-Save the fortran code as fg.f90
3-Build a DLL in Microsoft Developer Studio from command line with:

fl32/LD fg.f90

which creates a DLL named fg.dll
4-Copy a fg.dll to c:\vb4
5-Run the visual basic project but in vb4.0 message of error is " Run-time error 453
           Specified Dll function not found"
and in vb 6.0 is "Run-time error 453
       can't find Dll entry point fotarra in ..."

I want for you if possible solved this my problem and send me.

Thank You
Jafar Sadeghzadeh Ahari

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