Native DLL Entry Point not Found

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VB

Hi Guys/Gals

Wondering if you can shed some light, i am trying to use a pre-exisiting DLL with no access to any source and limited documentation. I have scoured the internet for some time and struggling now, i used DUMPBIN /EXPORTS to get the entry points:

ordinal hint RVA      name

      1    0 00005650 ??0CAGDGatewayCallBack@@QAE@ABV0@@Z
      2    1 00005620 ??0CAGDGatewayCallBack@@QAE@XZ
      3    2 00006340 ??0CAGDGatewayInterface@@QAE@PADPAVCAGDGatewayCallBack@@0H0H@Z
      4    3 00006450 ??1CAGDGatewayInterface@@QAE@XZ
      5    4 00005670 ??4CAGDGatewayCallBack@@QAEAAV0@ABV0@@Z
      6    5 00005690 ??4CAGDGatewayInterface@@QAEAAV0@ABV0@@Z
      7    6 0004C4FC ??_7CAGDGatewayCallBack@@6B@
      8    7 00007170 ?CallBackUpdate@CAGDGatewayInterface@@QAE?AW4AGDClientError@@W4AGDCallbackUpdateType@@HHHPAD1@Z
      9    8 00005FF0 ?CallBackUpdateAck@CAGDGatewayCallBack@@UAEXW4AGDCallbackUpdateType@@HHHPAD1JAAUAGDGatewayDateTime@@@
     10    9 00005ED0 ?CallCleared@CAGDGatewayCallBack@@UAEXJJJJAAUAGDGatewayDateTime@@@Z
     11    A 00007E90 ?DeleteAllExclusions@CAGDGatewayInterface@@QAE?AW4AGDClientError@@XZ
     12    B 00007FF0 ?DeleteExclusion@CAGDGatewayInterface@@QAE?AW4AGDClientError@@JPADJ@Z
     13    C 00006D10 ?DeleteRecordSet@CAGDGatewayInterface@@AAE_NXZ
     14    D 000059D0 ?Disconnect@CAGDGatewayInterface@@AAEXXZ
     15    E 00006130 ?Disposition@CAGDGatewayCallBack@@UAEXJJJJAAUUserDefinedData@@AAUAGDGatewayDateTime@@@Z
     16    F 000077E0 ?EndSession@CAGDGatewayInterface@@QAE?AW4AGDClientError@@XZ
     17   10 00005B10 ?ExecuteCCDown@CAGDGatewayInterface@@QAEXXZ
     18   11 00005C50 ?ExecuteCCTimeOut@CAGDGatewayInterface@@QAEXXZ
     19   12 00005D80 ?ExecuteCCUp@CAGDGatewayInterface@@QAEXXZ
     20   13 00006060 ?FoundAgent@CAGDGatewayCallBack@@UAEXJJJPADAAUAGDGatewayDateTime@@@Z
     21   14 00005640 ?GetInterface@CAGDGatewayCallBack@@QAEPAXXZ
     22   15 00006730 ?GetMediaList@CAGDGatewayInterface@@QAE?AW4AGDClientError@@JJJ@Z
     23   16 000082C0 ?InsertExclusion@CAGDGatewayInterface@@QAE?AW4AGDClientError@@JPADJ00@Z
     24   17 00008180 ?InsertExclusionWithoutNotify@CAGDGatewayInterface@@QAE?AW4AGDClientError@@JPADJ00@Z
     25   18 000075E0 ?KillAllCallsInService@CAGDGatewayInterface@@QAE?AW4AGDClientError@@J@Z
     26   19 000074D0 ?KillCall@CAGDGatewayInterface@@QAE?AW4AGDClientError@@JJJ@Z
     27   1A 00006840 ?KillMediaCall@CAGDGatewayInterface@@QAE?AW4AGDClientError@@J@Z
     28   1B 00007970 ?LoginToCC@CAGDGatewayInterface@@AAE_NPADH@Z
     29   1C 000062E0 ?MediaCallGone@CAGDGatewayCallBack@@UAEX_NJ@Z
     30   1D 00006280 ?MediaListCall@CAGDGatewayCallBack@@UAEXJJJJJJJ@Z
     31   1E 000061F0 ?MediaListCall@CAGDGatewayCallBack@@UAEXJJJJJJJJ@Z
     32   1F 000072A0 ?NewCall@CAGDGatewayInterface@@QAE?AW4AGDClientError@@JAAUUserDefinedData@@J@Z
     33   20 00005F90 ?NewCallAck@CAGDGatewayCallBack@@UAEXJJJJJAAUAGDGatewayDateTime@@@Z
     34   21 000073B0 ?NewCallAgent@CAGDGatewayInterface@@QAE?AW4AGDClientError@@JAAUUserDefinedData@@JPAD@Z
     35   22 00006650 ?NotifyCCOfExclusionInsert@CAGDGatewayInterface@@QAE?AW4AGDClientError@@XZ
     36   23 00005830 ?PrintInBoundPacket@CAGDGatewayInterface@@AAEXPAX@Z
     37   24 00005710 ?PrintOutGoingPacket@CAGDGatewayInterface@@AAEXPAX@Z
     38   25 00006930 ?ProcessPacket@CAGDGatewayInterface@@AAEXPAX@Z
     39   26 000060C0 ?ReRoute@CAGDGatewayCallBack@@UAEXJJJJJJAAUUserDefinedData@@AAUAGDGatewayDateTime@@@Z
     40   27 00006640 ?SendNewCallPacket@CAGDGatewayInterface@@AAE?AW4AGDClientError@@PAXJ@Z
     41   28 00006480 ?SendPacket@CAGDGatewayInterface@@AAE?AW4AGDClientError@@PAXJ@Z
     42   29 00007B60 ?SendTECommand@CAGDGatewayInterface@@AAE_NHPAXHH@Z
     43   2A 00005F30 ?ServiceStatus@CAGDGatewayCallBack@@UAEXJJAAUAGDGatewayDateTime@@@Z
     44   2B 00005630 ?SetInterface@CAGDGatewayCallBack@@QAEXPAX@Z
     45   2C 00007C30 ?StartSession@CAGDGatewayInterface@@QAE?AW4AGDClientError@@XZ
     46   2D 000076D0 ?UpdateCallData@CAGDGatewayInterface@@QAE?AW4AGDClientError@@JJJAAUUserDefinedData@@@Z
     47   2E 00006190 ?UpdateCallDataAck@CAGDGatewayCallBack@@UAEXJJJJAAUAGDGatewayDateTime@@@Z

From here i used the undname command to retrieve the undecorated name for a call:

Undecoration of :- "?DeleteAllExclusions@CAGDGatewayInterface@@QAE?AW4AGDClientError@@XZ"
is :- "public: enum AGDClientError __thiscall CAGDGatewayInterface::DeleteAllExclusions(void)"

From here i am now trying to use DLLImport to perform the command but i keep getting 'Entry Point Not Found'

Could any one assist with this by any chance?

My Code:

<DllImport("AGDGatewayInterface.dll")> _
Private Shared Function DeleteAllExclusions() As AGDClientError
End Function


Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
    Call DeleteAllExclusions()

End Sub

Error Returned when trying to run this:

Unable to find an entry point named 'DeleteAllExclusions' in DLL 'AGDGatewayInterface.dll'.

Many Thanks
Dev