C++ DLL Incorporation

[willc0de4food]

Hey, i have a problem where i can write a dll in MSVC++ and use it in VB .NET but when i try to write one in Dev-C++, it fails and pretends i dont have a [dllname].def file so i was wondering if anyone could tell me what i'm doing wrong or how to fix this problem. the DLL's name comes out as circlearea_devcpp.dll. here's my VB Code:

Private Declare Function ReturnVersion Lib "C:\Documents and Settings\Tim Hansen\My Documents\Visual Studio Projects\circlearea_devcpp.dll" () As Long
    Private Declare Function circlearea Lib "C:\Documents and Settings\Tim Hansen\My Documents\Visual Studio Projects\circlearea_devcpp.dll" (ByVal area As Double) As Double


    Private Sub About_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles About.Click
        ' Report Version Number
        Call MsgBox(ReturnVersion())
    End Sub

    Private Sub Bye_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Bye.Click
        Application.Exit()
    End Sub

    Private Sub Calculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Calculate.Click

        Dim area, radius As Double

        radius = InputBox.Text
        ' call to dll for area calculation
        area = circlearea(radius)

        OutputBox.Text = Str$(area)

    End Sub

    Private Sub Clear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Clear.Click
        InputBox.ResetText()
        OutputBox.ResetText()
    End Sub

here's my C++ Code:

#include "stdafx.h"
#include <windows.h>

BOOL APIENTRY DllMain( HANDLE hModule, 
                       DWORD  ul_reason_for_call, 
                       LPVOID lpReserved
					 )
{
    return TRUE;
}


int ReturnVersion(void)
{
	int version = 1;
	return version;
}

double circlearea(double radius)
{
	double area;

	area = 3.1415926535 * (radius * radius);

	return area;
}

and then Dev-C++ generates a .def file and i've tried writing it myself which doesn't work either
here's theirs, filename - libcirclearea_devcpp.def:

; dlltool --base-file C:\DOCUME~1\TIMHAN~1\LOCALS~1\Temp/cca03420.base
 --output-exp circlearea_devcpp.exp --dllname circlearea_devcpp.dll --output-def
libcirclearea_devcpp.def --no-export-all-symbols --add-stdcall-alias
--exclude-symbol=DllMainCRTStartup@12 
--def C:\DOCUME~1\TIMHAN~1\LOCALS~1\Temp/cca03420.def --output-lib
libcirclearea_devcpp.a
EXPORTS

and mine, filename - circlearea_devcpp.def:

EXPORTS
      ReturnVersion
      circlearea

any thoughts? thanks

 

[willc0de4food]

yea so uh....this forum sucks.

 

[JuggaloBrotha]

if any of us here new how to help you we would have, there isnt always someone here who can answer all the questions