interop between VB.NET and eVC++

[Eric BOUXIROT]

hi there,

i'm working on a smart application project on VB.NET. i must call API
(custom eVC++ DLL) but i have some trouble with mashalas attribute.....
i have copy/past a sample on msdn help but it's not working..
IDE says "unknown 'mashalAs' attribute".....and i don't know why....

i have try exactly the same code on a normal windows project and it work
(compile) fine...

i don't know what i've missed....

here some lines of my code...

thank a lot...

Imports System.Runtime.InteropServices

Public Class Form1

Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll" (ByRef
IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg As String)
As Int32

[Alex Feinman [MVP]]

MarshalAs attribute is not supported in CF - simply drop it, and your string
will be passed as LPCWSTR (note the constant part)
As for a byte array, replace ByRef with ByVal - the array will be passed
down as LPBYTE

--
Alex Feinman
---
Visit http://www.opennetcf.org
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

hi there,

i'm working on a smart application project on VB.NET. i must call API
(custom eVC++ DLL) but i have some trouble with mashalas attribute.....
i have copy/past a sample on msdn help but it's not working..
IDE says "unknown 'mashalAs' attribute".....and i don't know why....

i have try exactly the same code on a normal windows project and it work
(compile) fine...

i don't know what i've missed....

here some lines of my code...

thank a lot...

Imports System.Runtime.InteropServices

Public Class Form1

Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll" (ByRef
IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg As
String) As Int32

[Eric BOUXIROT]

oh ok.....

thank, but i have one more question...
in my eVC++ DLL some functions use non-unicode strings (unsigned char*)

how i can tell VB to call DLL with non-UNICODE string format ?

thank a lot !
"Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le message
de news: uH**************@TK2MSFTNGP09.phx.gbl...

MarshalAs attribute is not supported in CF - simply drop it, and your
string will be passed as LPCWSTR (note the constant part)
As for a byte array, replace ByRef with ByVal - the array will be passed
down as LPBYTE

--
Alex Feinman
---
Visit http://www.opennetcf.org
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

hi there,

i'm working on a smart application project on VB.NET. i must call API
(custom eVC++ DLL) but i have some trouble with mashalas attribute.....
i have copy/past a sample on msdn help but it's not working..
IDE says "unknown 'mashalAs' attribute".....and i don't know why....

i have try exactly the same code on a normal windows project and it work
(compile) fine...

i don't know what i've missed....

here some lines of my code...

thank a lot...

Imports System.Runtime.InteropServices

Public Class Form1

Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll" (ByRef
IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg As
String) As Int32

[Chris Tacke, eMVP]

Pass a byte array.

-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

oh ok.....

thank, but i have one more question...
in my eVC++ DLL some functions use non-unicode strings (unsigned char*)

how i can tell VB to call DLL with non-UNICODE string format ?

thank a lot !
"Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le message
de news: uH**************@TK2MSFTNGP09.phx.gbl...

MarshalAs attribute is not supported in CF - simply drop it, and your
string will be passed as LPCWSTR (note the constant part)
As for a byte array, replace ByRef with ByVal - the array will be passed
down as LPBYTE

--
Alex Feinman
---
Visit http://www.opennetcf.org
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

hi there,

i'm working on a smart application project on VB.NET. i must call API
(custom eVC++ DLL) but i have some trouble with mashalas attribute.....
i have copy/past a sample on msdn help but it's not working..
IDE says "unknown 'mashalAs' attribute".....and i don't know why....

i have try exactly the same code on a normal windows project and it work (compile) fine...

i don't know what i've missed....

here some lines of my code...

thank a lot...

Imports System.Runtime.InteropServices

Public Class Form1

Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll" (ByRef
IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg As
String) As Int32

[Eric BOUXIROT]

yes i have already test this....it's ok but in my VB code i can't directly
convert String to byte array..

like this..
DLLFunction ("Toto".tobytearray)

i must declare one byte array then fill it with the string chars....then
call my function...
Dim bytearray(50) as byte
convertstring2bytearray ("toto",bytearray)
DLLFunction(bytearray)

i prefer the first method....but how i can implement the toByteArray method
to the string class ?

thank a lot .

"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le message
de news: Ow**************@TK2MSFTNGP15.phx.gbl...

Pass a byte array.

-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

oh ok.....

thank, but i have one more question...
in my eVC++ DLL some functions use non-unicode strings (unsigned char*)

how i can tell VB to call DLL with non-UNICODE string format ?

thank a lot !
"Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le
message
de news: uH**************@TK2MSFTNGP09.phx.gbl...

> MarshalAs attribute is not supported in CF - simply drop it, and your
> string will be passed as LPCWSTR (note the constant part)
> As for a byte array, replace ByRef with ByVal - the array will be
> passed
> down as LPBYTE
>
> --
> Alex Feinman
> ---
> Visit http://www.opennetcf.org
> "Eric BOUXIROT" <ri****@rickou.net> wrote in message
> news:41**********************@news.free.fr...
>> hi there,
>>
>> i'm working on a smart application project on VB.NET. i must call API
>> (custom eVC++ DLL) but i have some trouble with mashalas
>> attribute.....
>> i have copy/past a sample on msdn help but it's not working..
>> IDE says "unknown 'mashalAs' attribute".....and i don't know why....
>>
>> i have try exactly the same code on a normal windows project and it work >> (compile) fine...
>>
>> i don't know what i've missed....
>>
>> here some lines of my code...
>>
>> thank a lot...
>>
>> Imports System.Runtime.InteropServices
>>
>> Public Class Form1
>>
>> Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll" (ByRef
>> IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg As
>> String) As Int32
>>
>>
>
>

[Chris Tacke, eMVP]

Use the Encoding class to change it.

-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

yes i have already test this....it's ok but in my VB code i can't directly
convert String to byte array..

like this..
DLLFunction ("Toto".tobytearray)

i must declare one byte array then fill it with the string chars....then
call my function...
Dim bytearray(50) as byte
convertstring2bytearray ("toto",bytearray)
DLLFunction(bytearray)

i prefer the first method....but how i can implement the toByteArray method to the string class ?

thank a lot .

"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le message de news: Ow**************@TK2MSFTNGP15.phx.gbl...

Pass a byte array.

-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

oh ok.....

thank, but i have one more question...
in my eVC++ DLL some functions use non-unicode strings (unsigned char*)

how i can tell VB to call DLL with non-UNICODE string format ?

thank a lot !
"Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le
message
de news: uH**************@TK2MSFTNGP09.phx.gbl...
> MarshalAs attribute is not supported in CF - simply drop it, and your
> string will be passed as LPCWSTR (note the constant part)
> As for a byte array, replace ByRef with ByVal - the array will be
> passed
> down as LPBYTE
>
> --
> Alex Feinman
> ---
> Visit http://www.opennetcf.org
> "Eric BOUXIROT" <ri****@rickou.net> wrote in message
> news:41**********************@news.free.fr...
>> hi there,
>>
>> i'm working on a smart application project on VB.NET. i must call API >> (custom eVC++ DLL) but i have some trouble with mashalas
>> attribute.....
>> i have copy/past a sample on msdn help but it's not working..
>> IDE says "unknown 'mashalAs' attribute".....and i don't know why....
>>
>> i have try exactly the same code on a normal windows project and it

work

>> (compile) fine...
>>
>> i don't know what i've missed....
>>
>> here some lines of my code...
>>
>> thank a lot...
>>
>> Imports System.Runtime.InteropServices
>>
>> Public Class Form1
>>
>> Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll" (ByRef
>> IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg As
>> String) As Int32
>>
>>
>
>

[Eric BOUXIROT]

an small example ?

thank a lot !
"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le message
de news: Oa**************@TK2MSFTNGP15.phx.gbl...

Use the Encoding class to change it.

-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

yes i have already test this....it's ok but in my VB code i can't
directly
convert String to byte array..

like this..
DLLFunction ("Toto".tobytearray)

i must declare one byte array then fill it with the string chars....then
call my function...
Dim bytearray(50) as byte
convertstring2bytearray ("toto",bytearray)
DLLFunction(bytearray)

i prefer the first method....but how i can implement the toByteArray

method

to the string class ?

thank a lot .

"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le

message

de news: Ow**************@TK2MSFTNGP15.phx.gbl...

> Pass a byte array.
>
> -Chris
>
>
> "Eric BOUXIROT" <ri****@rickou.net> wrote in message
> news:41**********************@news.free.fr...
>> oh ok.....
>>
>> thank, but i have one more question...
>> in my eVC++ DLL some functions use non-unicode strings (unsigned
>> char*)
>>
>> how i can tell VB to call DLL with non-UNICODE string format ?
>>
>> thank a lot !
>>
>>
>> "Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le
>> message
>> de news: uH**************@TK2MSFTNGP09.phx.gbl...
>> > MarshalAs attribute is not supported in CF - simply drop it, and
>> > your
>> > string will be passed as LPCWSTR (note the constant part)
>> > As for a byte array, replace ByRef with ByVal - the array will be
>> > passed
>> > down as LPBYTE
>> >
>> > --
>> > Alex Feinman
>> > ---
>> > Visit http://www.opennetcf.org
>> > "Eric BOUXIROT" <ri****@rickou.net> wrote in message
>> > news:41**********************@news.free.fr...
>> >> hi there,
>> >>
>> >> i'm working on a smart application project on VB.NET. i must call API >> >> (custom eVC++ DLL) but i have some trouble with mashalas
>> >> attribute.....
>> >> i have copy/past a sample on msdn help but it's not working..
>> >> IDE says "unknown 'mashalAs' attribute".....and i don't know
>> >> why....
>> >>
>> >> i have try exactly the same code on a normal windows project and it
> work
>> >> (compile) fine...
>> >>
>> >> i don't know what i've missed....
>> >>
>> >> here some lines of my code...
>> >>
>> >> thank a lot...
>> >>
>> >> Imports System.Runtime.InteropServices
>> >>
>> >> Public Class Form1
>> >>
>> >> Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll" (ByRef
>> >> IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg
>> >> As
>> >> String) As Int32
>> >>
>> >>
>> >
>> >
>>
>>
>
>

[Alex Feinman [MVP]]

Dim chars as Byte() = System.Text.Encoding.ASCII.GetBytes(myString)
THis is what you need to pass down to the unmanaged code

--
Alex Feinman
---
Visit http://www.opennetcf.org
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

an small example ?

thank a lot !
"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le
message de news: Oa**************@TK2MSFTNGP15.phx.gbl...

Use the Encoding class to change it.

-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

yes i have already test this....it's ok but in my VB code i can't
directly
convert String to byte array..

like this..
DLLFunction ("Toto".tobytearray)

i must declare one byte array then fill it with the string chars....then
call my function...
Dim bytearray(50) as byte
convertstring2bytearray ("toto",bytearray)
DLLFunction(bytearray)

i prefer the first method....but how i can implement the toByteArray

method

to the string class ?

thank a lot .

"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le

message

de news: Ow**************@TK2MSFTNGP15.phx.gbl...
> Pass a byte array.
>
> -Chris
>
>
> "Eric BOUXIROT" <ri****@rickou.net> wrote in message
> news:41**********************@news.free.fr...
>> oh ok.....
>>
>> thank, but i have one more question...
>> in my eVC++ DLL some functions use non-unicode strings (unsigned
>> char*)
>>
>> how i can tell VB to call DLL with non-UNICODE string format ?
>>
>> thank a lot !
>>
>>
>> "Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le
>> message
>> de news: uH**************@TK2MSFTNGP09.phx.gbl...
>> > MarshalAs attribute is not supported in CF - simply drop it, and
>> > your
>> > string will be passed as LPCWSTR (note the constant part)
>> > As for a byte array, replace ByRef with ByVal - the array will be
>> > passed
>> > down as LPBYTE
>> >
>> > --
>> > Alex Feinman
>> > ---
>> > Visit http://www.opennetcf.org
>> > "Eric BOUXIROT" <ri****@rickou.net> wrote in message
>> > news:41**********************@news.free.fr...
>> >> hi there,
>> >>
>> >> i'm working on a smart application project on VB.NET. i must call

API

>> >> (custom eVC++ DLL) but i have some trouble with mashalas
>> >> attribute.....
>> >> i have copy/past a sample on msdn help but it's not working..
>> >> IDE says "unknown 'mashalAs' attribute".....and i don't know
>> >> why....
>> >>
>> >> i have try exactly the same code on a normal windows project and
>> >> it
> work
>> >> (compile) fine...
>> >>
>> >> i don't know what i've missed....
>> >>
>> >> here some lines of my code...
>> >>
>> >> thank a lot...
>> >>
>> >> Imports System.Runtime.InteropServices
>> >>
>> >> Public Class Form1
>> >>
>> >> Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll"
>> >> (ByRef
>> >> IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg
>> >> As
>> >> String) As Int32
>> >>
>> >>
>> >
>> >
>>
>>
>
>

[Chris Tacke, eMVP]

Take a look at the sample in MSDN:

http://msdn.microsoft.com/library/en...nvertTopic.asp
-Chris

"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

an small example ?

thank a lot !
"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le message de news: Oa**************@TK2MSFTNGP15.phx.gbl...

Use the Encoding class to change it.

-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

yes i have already test this....it's ok but in my VB code i can't
directly
convert String to byte array..

like this..
DLLFunction ("Toto".tobytearray)

i must declare one byte array then fill it with the string chars....then call my function...
Dim bytearray(50) as byte
convertstring2bytearray ("toto",bytearray)
DLLFunction(bytearray)

i prefer the first method....but how i can implement the toByteArray

method

to the string class ?

thank a lot .

"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le

message

de news: Ow**************@TK2MSFTNGP15.phx.gbl...
> Pass a byte array.
>
> -Chris
>
>
> "Eric BOUXIROT" <ri****@rickou.net> wrote in message
> news:41**********************@news.free.fr...
>> oh ok.....
>>
>> thank, but i have one more question...
>> in my eVC++ DLL some functions use non-unicode strings (unsigned
>> char*)
>>
>> how i can tell VB to call DLL with non-UNICODE string format ?
>>
>> thank a lot !
>>
>>
>> "Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le
>> message
>> de news: uH**************@TK2MSFTNGP09.phx.gbl...
>> > MarshalAs attribute is not supported in CF - simply drop it, and
>> > your
>> > string will be passed as LPCWSTR (note the constant part)
>> > As for a byte array, replace ByRef with ByVal - the array will be
>> > passed
>> > down as LPBYTE
>> >
>> > --
>> > Alex Feinman
>> > ---
>> > Visit http://www.opennetcf.org
>> > "Eric BOUXIROT" <ri****@rickou.net> wrote in message
>> > news:41**********************@news.free.fr...
>> >> hi there,
>> >>
>> >> i'm working on a smart application project on VB.NET. i must call

API

>> >> (custom eVC++ DLL) but i have some trouble with mashalas
>> >> attribute.....
>> >> i have copy/past a sample on msdn help but it's not working..
>> >> IDE says "unknown 'mashalAs' attribute".....and i don't know
>> >> why....
>> >>
>> >> i have try exactly the same code on a normal windows project and it > work
>> >> (compile) fine...
>> >>
>> >> i don't know what i've missed....
>> >>
>> >> here some lines of my code...
>> >>
>> >> thank a lot...
>> >>
>> >> Imports System.Runtime.InteropServices
>> >>
>> >> Public Class Form1
>> >>
>> >> Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll" (ByRef >> >> IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg
>> >> As
>> >> String) As Int32
>> >>
>> >>
>> >
>> >
>>
>>
>
>

[Eric BOUXIROT]

ok thank a lot for your very quick answers...
it work fine....

"Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le message
de news: eS*************@tk2msftngp13.phx.gbl...

Dim chars as Byte() = System.Text.Encoding.ASCII.GetBytes(myString)
THis is what you need to pass down to the unmanaged code

--
Alex Feinman
---
Visit http://www.opennetcf.org
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

an small example ?

thank a lot !
"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le
message de news: Oa**************@TK2MSFTNGP15.phx.gbl...

Use the Encoding class to change it.

-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...
yes i have already test this....it's ok but in my VB code i can't
directly
convert String to byte array..

like this..
DLLFunction ("Toto".tobytearray)

i must declare one byte array then fill it with the string
chars....then
call my function...
Dim bytearray(50) as byte
convertstring2bytearray ("toto",bytearray)
DLLFunction(bytearray)

i prefer the first method....but how i can implement the toByteArray
method
to the string class ?

thank a lot .

"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le
message
de news: Ow**************@TK2MSFTNGP15.phx.gbl...
> Pass a byte array.
>
> -Chris
>
>
> "Eric BOUXIROT" <ri****@rickou.net> wrote in message
> news:41**********************@news.free.fr...
>> oh ok.....
>>
>> thank, but i have one more question...
>> in my eVC++ DLL some functions use non-unicode strings (unsigned
>> char*)
>>
>> how i can tell VB to call DLL with non-UNICODE string format ?
>>
>> thank a lot !
>>
>>
>> "Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le
>> message
>> de news: uH**************@TK2MSFTNGP09.phx.gbl...
>> > MarshalAs attribute is not supported in CF - simply drop it, and
>> > your
>> > string will be passed as LPCWSTR (note the constant part)
>> > As for a byte array, replace ByRef with ByVal - the array will be
>> > passed
>> > down as LPBYTE
>> >
>> > --
>> > Alex Feinman
>> > ---
>> > Visit http://www.opennetcf.org
>> > "Eric BOUXIROT" <ri****@rickou.net> wrote in message
>> > news:41**********************@news.free.fr...
>> >> hi there,
>> >>
>> >> i'm working on a smart application project on VB.NET. i must call
API
>> >> (custom eVC++ DLL) but i have some trouble with mashalas
>> >> attribute.....
>> >> i have copy/past a sample on msdn help but it's not working..
>> >> IDE says "unknown 'mashalAs' attribute".....and i don't know
>> >> why....
>> >>
>> >> i have try exactly the same code on a normal windows project and
>> >> it
> work
>> >> (compile) fine...
>> >>
>> >> i don't know what i've missed....
>> >>
>> >> here some lines of my code...
>> >>
>> >> thank a lot...
>> >>
>> >> Imports System.Runtime.InteropServices
>> >>
>> >> Public Class Form1
>> >>
>> >> Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll"
>> >> (ByRef
>> >> IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg
>> >> As
>> >> String) As Int32
>> >>
>> >>
>> >
>> >
>>
>>
>
>

[Peter Foot [MVP]]

asciibytes = System.Text.Encoding.ASCII.GetBytes("Hello World")

Peter

--
Peter Foot
Windows Embedded MVP
www.inthehand.com | www.opennetcf.org

Do have an opinion on the effectiveness of Microsoft Windows Mobile and
Embedded newsgroups? Let us know!
https://www.windowsembeddedeval.com/...ity/newsgroups

"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

an small example ?

thank a lot !
"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le
message de news: Oa**************@TK2MSFTNGP15.phx.gbl...

Use the Encoding class to change it.

-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...

yes i have already test this....it's ok but in my VB code i can't
directly
convert String to byte array..

like this..
DLLFunction ("Toto".tobytearray)

i must declare one byte array then fill it with the string chars....then
call my function...
Dim bytearray(50) as byte
convertstring2bytearray ("toto",bytearray)
DLLFunction(bytearray)

i prefer the first method....but how i can implement the toByteArray

method

to the string class ?

thank a lot .

"Chris Tacke, eMVP" <ct****@spamfree-opennetcf.org> a écrit dans le

message

de news: Ow**************@TK2MSFTNGP15.phx.gbl...
> Pass a byte array.
>
> -Chris
>
>
> "Eric BOUXIROT" <ri****@rickou.net> wrote in message
> news:41**********************@news.free.fr...
>> oh ok.....
>>
>> thank, but i have one more question...
>> in my eVC++ DLL some functions use non-unicode strings (unsigned
>> char*)
>>
>> how i can tell VB to call DLL with non-UNICODE string format ?
>>
>> thank a lot !
>>
>>
>> "Alex Feinman [MVP]" <pu*********@alexfeinman.com> a écrit dans le
>> message
>> de news: uH**************@TK2MSFTNGP09.phx.gbl...
>> > MarshalAs attribute is not supported in CF - simply drop it, and
>> > your
>> > string will be passed as LPCWSTR (note the constant part)
>> > As for a byte array, replace ByRef with ByVal - the array will be
>> > passed
>> > down as LPBYTE
>> >
>> > --
>> > Alex Feinman
>> > ---
>> > Visit http://www.opennetcf.org
>> > "Eric BOUXIROT" <ri****@rickou.net> wrote in message
>> > news:41**********************@news.free.fr...
>> >> hi there,
>> >>
>> >> i'm working on a smart application project on VB.NET. i must call

API

>> >> (custom eVC++ DLL) but i have some trouble with mashalas
>> >> attribute.....
>> >> i have copy/past a sample on msdn help but it's not working..
>> >> IDE says "unknown 'mashalAs' attribute".....and i don't know
>> >> why....
>> >>
>> >> i have try exactly the same code on a normal windows project and
>> >> it
> work
>> >> (compile) fine...
>> >>
>> >> i don't know what i've missed....
>> >>
>> >> here some lines of my code...
>> >>
>> >> thank a lot...
>> >>
>> >> Imports System.Runtime.InteropServices
>> >>
>> >> Public Class Form1
>> >>
>> >> Public Declare Function F_BDO_MessageBoxOK Lib "PDA_BDO.dll"
>> >> (ByRef
>> >> IN_title() As Byte, <MarshalAs(UnmanagedType.LPStr)> ByRef IN_msg
>> >> As
>> >> String) As Int32
>> >>
>> >>
>> >
>> >
>>
>>
>
>