External dll

**GArlington** · Jun 27 '08, 07:57 PM

Re: External dll

On Jun 10, 8:52 am, "Marino" <mar...@dir.hrw rote:

Hi!
>
I have a problem in calling a function from an external dll source.
Prototype for a function is given in vb code
>
Declare Function GetMessageData Lib "c:\windows\sys tem\smartdll.dl l" (ByVal
theLength As Integer, ByRef theMessageLengt h As Integer, ByVal
theMessageData As String) As Integer

I suspect that your problem comes from "ByRef theMessageLengt h As
Integer",
you should call the finction with (theLength, ref theMessageLengt h,
theMessageData)
see REF before theMessageLengt h

>
I would like to call this funcition from c# and I just can't seem to get a
hang of it...
Manufacturer description is very scarce...
Where should I use the string, or do I need StringBuilder, can anyone help?
>
Thanks,
Marino

**Ignacio Machin ( .NET/ C# MVP )** · Jun 27 '08, 07:57 PM

Re: External dll

On Jun 10, 3:52 am, "Marino" <mar...@dir.hrw rote:

Hi!
>
I have a problem in calling a function from an external dll source.
Prototype for a function is given in vb code
>
Declare Function GetMessageData Lib "c:\windows\sys tem\smartdll.dl l" (ByVal
theLength As Integer, ByRef theMessageLengt h As Integer, ByVal
theMessageData As String) As Integer
>
I would like to call this funcition from c# and I just can't seem to get a
hang of it...
Manufacturer description is very scarce...
Where should I use the string, or do I need StringBuilder, can anyone help?
>
Thanks,
Marino

Does the function works in VB?
Is that VB.NET or VB6?

What kind of dll is it? Is it a win32 one or a COM dll?

**Marino** · Jun 27 '08, 07:57 PM

Re: External dll

Yes, that seems to be the problem. Thank you!
Even though that works in some functions, while other have problems.
I am currently thinking that the problem is within incompatibile types,
because I am programming in .net while this dll seems to function the best
in "old" languages...
Will keep trying...

"GArlington " <garlington@tis cali.co.ukwrote in message
news:af4be5c2-46a9-41a2-997a-5fafb52de759@s5 0g2000hsb.googl egroups.com...

On Jun 10, 8:52 am, "Marino" <mar...@dir.hrw rote:

>Hi!
>>
>I have a problem in calling a function from an external dll source.
>Prototype for a function is given in vb code
>>
>Declare Function GetMessageData Lib "c:\windows\sys tem\smartdll.dl l"
>(ByVal
>theLength As Integer, ByRef theMessageLengt h As Integer, ByVal
>theMessageDa ta As String) As Integer

I suspect that your problem comes from "ByRef theMessageLengt h As
Integer",
you should call the finction with (theLength, ref theMessageLengt h,
theMessageData)
see REF before theMessageLengt h

>>
>I would like to call this funcition from c# and I just can't seem to get
>a
>hang of it...
>Manufacturer description is very scarce...
>Where should I use the string, or do I need StringBuilder, can anyone
>help?
>>
>Thanks,
>Marino

>

**Ben Voigt [C++ MVP]** · Jun 27 '08, 07:57 PM

Re: External dll

Marino wrote:

Yes, that seems to be the problem. Thank you!
Even though that works in some functions, while other have problems.
I am currently thinking that the problem is within incompatibile
types, because I am programming in .net while this dll seems to
function the best in "old" languages...
Will keep trying...

VB6 Integer is .NET System.Int16, not the same as C# int (which is
System.Int32)

That may be your problem.

>
"GArlington " <garlington@tis cali.co.ukwrote in message
news:af4be5c2-46a9-41a2-997a-5fafb52de759@s5 0g2000hsb.googl egroups.com...

>On Jun 10, 8:52 am, "Marino" <mar...@dir.hrw rote:

>>Hi!
>>>
>>I have a problem in calling a function from an external dll source.
>>Prototype for a function is given in vb code
>>>
>>Declare Function GetMessageData Lib "c:\windows\sys tem\smartdll.dl l"
>>(ByVal
>>theLength As Integer, ByRef theMessageLengt h As Integer, ByVal
>>theMessageDat a As String) As Integer

>I suspect that your problem comes from "ByRef theMessageLengt h As
>Integer",
>you should call the finction with (theLength, ref theMessageLengt h,
>theMessageData )
>see REF before theMessageLengt h

>>>
>>I would like to call this funcition from c# and I just can't seem
>>to get a
>>hang of it...
>>Manufacture r description is very scarce...
>>Where should I use the string, or do I need StringBuilder, can
>>anyone help?
>>>
>>Thanks,
>>Marino

**Marino** · Jun 27 '08, 07:57 PM

Re: External dll

This solved the problem... Strange dll, it references as though params are
long, but in some params it only accepts int16, in some int and in some
long... Very strange..

Thank you a bunch for your help!!

"Ben Voigt [C++ MVP]" <rbv@nospam.nos pamwrote in message
news:Oc62dPAzIH A.2220@TK2MSFTN GP06.phx.gbl...

Marino wrote:

>Yes, that seems to be the problem. Thank you!
>Even though that works in some functions, while other have problems.
>I am currently thinking that the problem is within incompatibile
>types, because I am programming in .net while this dll seems to
>function the best in "old" languages...
>Will keep trying...

>
VB6 Integer is .NET System.Int16, not the same as C# int (which is
System.Int32)
>
That may be your problem.
>

>>
>"GArlington " <garlington@tis cali.co.ukwrote in message
>news:af4be5c 2-46a9-41a2-997a-5fafb52de759@s5 0g2000hsb.googl egroups.com...

>>On Jun 10, 8:52 am, "Marino" <mar...@dir.hrw rote:
>>>Hi!
>>>>
>>>I have a problem in calling a function from an external dll source.
>>>Prototype for a function is given in vb code
>>>>
>>>Declare Function GetMessageData Lib "c:\windows\sys tem\smartdll.dl l"
>>>(ByVal
>>>theLength As Integer, ByRef theMessageLengt h As Integer, ByVal
>>>theMessageDa ta As String) As Integer
>>I suspect that your problem comes from "ByRef theMessageLengt h As
>>Integer",
>>you should call the finction with (theLength, ref theMessageLengt h,
>>theMessageDat a)
>>see REF before theMessageLengt h
>>>>
>>>I would like to call this funcition from c# and I just can't seem
>>>to get a
>>>hang of it...
>>>Manufactur er description is very scarce...
>>>Where should I use the string, or do I need StringBuilder, can
>>>anyone help?
>>>>
>>>Thanks,
>>>Marino

>
>

**Ben Voigt [C++ MVP]** · Jun 27 '08, 07:57 PM

Re: External dll

Marino wrote:

This solved the problem... Strange dll, it references as though
params are long, but in some params it only accepts int16, in some
int and in some long... Very strange..

I highly doubt that any of the parameters are a C# long (System.Int64).
LONG in C++ and Long in VB6 are the same as .NET System.Int32.

>
Thank you a bunch for your help!!
>
"Ben Voigt [C++ MVP]" <rbv@nospam.nos pamwrote in message
news:Oc62dPAzIH A.2220@TK2MSFTN GP06.phx.gbl...

>Marino wrote:

>>Yes, that seems to be the problem. Thank you!
>>Even though that works in some functions, while other have problems.
>>I am currently thinking that the problem is within incompatibile
>>types, because I am programming in .net while this dll seems to
>>function the best in "old" languages...
>>Will keep trying...

>>
>VB6 Integer is .NET System.Int16, not the same as C# int (which is
>System.Int32 )
>>
>That may be your problem.
>>

>>>
>>"GArlington " <garlington@tis cali.co.ukwrote in message
>>news:af4be5 c2-46a9-41a2-997a-5fafb52de759@s5 0g2000hsb.googl egroups.com...
>>>On Jun 10, 8:52 am, "Marino" <mar...@dir.hrw rote:
>>>>Hi!
>>>>>
>>>>I have a problem in calling a function from an external dll
>>>>source. Prototype for a function is given in vb code
>>>>>
>>>>Declare Function GetMessageData Lib
>>>>"c:\windows \system\smartdl l.dll" (ByVal
>>>>theLength As Integer, ByRef theMessageLengt h As Integer, ByVal
>>>>theMessageD ata As String) As Integer
>>>I suspect that your problem comes from "ByRef theMessageLengt h As
>>>Integer",
>>>you should call the finction with (theLength, ref theMessageLengt h,
>>>theMessageDa ta)
>>>see REF before theMessageLengt h
>>>>>
>>>>I would like to call this funcition from c# and I just can't seem
>>>>to get a
>>>>hang of it...
>>>>Manufacture r description is very scarce...
>>>>Where should I use the string, or do I need StringBuilder, can
>>>>anyone help?
>>>>>
>>>>Thanks,
>>>>Marino

**Marino** · Jun 27 '08, 07:57 PM

Re: External dll

Seems strange to me to, but if I use any other filetype other than long it
doesn''t work...

"Ben Voigt [C++ MVP]" <rbv@nospam.nos pamwrote in message
news:%23JTUiyIz IHA.3680@TK2MSF TNGP05.phx.gbl. ..

Marino wrote:

>This solved the problem... Strange dll, it references as though
>params are long, but in some params it only accepts int16, in some
>int and in some long... Very strange..

>
I highly doubt that any of the parameters are a C# long (System.Int64).
LONG in C++ and Long in VB6 are the same as .NET System.Int32.
>

>>
>Thank you a bunch for your help!!
>>
>"Ben Voigt [C++ MVP]" <rbv@nospam.nos pamwrote in message
>news:Oc62dPAzI HA.2220@TK2MSFT NGP06.phx.gbl.. .

>>Marino wrote:
>>>Yes, that seems to be the problem. Thank you!
>>>Even though that works in some functions, while other have problems.
>>>I am currently thinking that the problem is within incompatibile
>>>types, because I am programming in .net while this dll seems to
>>>function the best in "old" languages...
>>>Will keep trying...
>>>
>>VB6 Integer is .NET System.Int16, not the same as C# int (which is
>>System.Int3 2)
>>>
>>That may be your problem.
>>>
>>>>
>>>"GArlingto n" <garlington@tis cali.co.ukwrote in message
>>>news:af4be5c 2-46a9-41a2-997a-5fafb52de759@s5 0g2000hsb.googl egroups.com...
>>>>On Jun 10, 8:52 am, "Marino" <mar...@dir.hrw rote:
>>>>>Hi!
>>>>>>
>>>>>I have a problem in calling a function from an external dll
>>>>>source. Prototype for a function is given in vb code
>>>>>>
>>>>>Declare Function GetMessageData Lib
>>>>>"c:\window s\system\smartd ll.dll" (ByVal
>>>>>theLengt h As Integer, ByRef theMessageLengt h As Integer, ByVal
>>>>>theMessage Data As String) As Integer
>>>>I suspect that your problem comes from "ByRef theMessageLengt h As
>>>>Integer",
>>>>you should call the finction with (theLength, ref theMessageLengt h,
>>>>theMessageD ata)
>>>>see REF before theMessageLengt h
>>>>>>
>>>>>I would like to call this funcition from c# and I just can't seem
>>>>>to get a
>>>>>hang of it...
>>>>>Manufactur er description is very scarce...
>>>>>Where should I use the string, or do I need StringBuilder, can
>>>>>anyone help?
>>>>>>
>>>>>Thanks,
>>>>>Marino

>
>

External dll

External dll

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