VB.NET和eVC ++之间的互操作 [英] interop between VB.NET and eVC++
本文介绍了VB.NET和eVC ++之间的互操作的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
那里，
我正在开发一个关于VB.NET的智能应用程序项目。我必须调用API
（自定义eVC ++ DLL）但我在使用mashalas属性时遇到了一些问题.....
i在msdn帮助上复制/过去样本但是它'不工作..
IDE说'未知''mashalAs''属性'.....我不知道为什么......
i在普通的Windows项目中尝试完全相同的代码并且它可以工作
（编译）很好......
i不要知道我错过了什么....
这里有一些我的代码...
非常感谢...
导入System.Runtime.InteropServices
公共类Form1
公共声明函数F_BDO_MessageBoxOK Lib " PDA_BDO.dll" （ByRef
IN_title（）As Byte，< MarshalAs（UnmanagedType.LPStr）> ByRef IN_msg As String）
As Int32
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
推荐答案
CF中不支持MarshalAs属性 - 只需删除它，你的字符串
将作为LPCWSTR传递（注意常量部分）
至于字节数组，用ByVal替换ByRef - 数组将通过
降低为LPBYTE
-
Alex Feinman
---
访问 http://www.opennetcf.org
" Eric BOUXIROT" < RI **** @ rickou.net>在消息中写道
news：41 ********************** @ news.free.fr ...
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...
那里，
我正在研究VB.NET上的智能应用程序项目。我必须调用API
（自定义eVC ++ DLL），但我对mashalas属性有一些麻烦.....
我已经在msdn帮助上复制/过去了一个样本但是它没有工作.. < IDE说未知'mashalAs''属性'.....我不知道为什么......
我在正常情况下尝试完全相同的代码windows项目和它工作
（编译）很好......
我不知道我错过了什么....
这里有些我的代码行...
非常感谢...
Imports System.Runtime.InteropServices
Public Class Form1
公共声明函数F_BDO_MessageBoxOK LibPDA_BDO.dll （ByRef
IN_title（）As Byte，< MarshalAs（UnmanagedType.LPStr）> ByRef IN_msg As
String）As Int32
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
哦确定.....
谢谢，但我还有一个问题......
在我的eVC ++ DLL中有些功能使用非unicode字符串（unsigned char *）
如何告诉VB用非UNICODE字符串格式调用DLL？
谢谢很多！
" Alex Feinman [MVP]" < PU ********* @ alexfeinman.com> écritdansle message
de news： uH *** ***********@TK2MSFTNGP09.phx.gbl ...
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...
CF不支持MarshalAs属性 - 只需删除它，然后你的
字符串将作为LPCWSTR传递（注意常量部分）
至于字节数组，用ByVal替换ByRef - 数组将作为LPBYTE传递
- < Alex Feinman
---
访问 http：//www.opennetcf .org
Eric BOUXIROT < RI **** @ rickou.net>在消息中写道
新闻：41 ********************** @ news.free.fr ...
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那里，我正在开发一个关于VB.NET的智能应用程序项目。我必须调用API
（自定义eVC ++ DLL），但我对mashalas属性有一些麻烦.....
我已经在msdn帮助上复制/过去了一个样本但是它没有工作.. < IDE说未知'mashalAs''属性'.....我不知道为什么......
我在正常情况下尝试完全相同的代码windows项目和它工作
（编译）很好......
我不知道我错过了什么....
这里有些我的代码行...
非常感谢...
Imports System.Runtime.InteropServices
Public Class Form1
公共声明函数F_BDO_MessageBoxOK LibPDA_BDO.dll （ByRef
IN_title（）As Byte，< MarshalAs（UnmanagedType.LPStr）> ByRef IN_msg As
String）As Int32
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
传递一个字节数组。
-Chris
" Eric BOUXIROT" < RI **** @ rickou.net>在消息中写道
news：41 ********************** @ news.free.fr ...
Pass a byte array.
-Chris
"Eric BOUXIROT" <ri****@rickou.net> wrote in message
news:41**********************@news.free.fr...
哦确定.....
谢谢，但我还有一个问题...
在我的eVC ++ DLL中，一些函数使用非unicode字符串（unsigned char *）
我怎么能告诉VB用非UNICODE字符串格式调用DLL？
非常感谢！
" Alex Feinman [MVP]" ; < PU ********* @ alexfeinman.com> écritdansle message
de news： uH ******* *******@TK2MSFTNGP09.phx.gbl ...
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...
CF不支持MarshalAs属性 - 只需删除它，你的
字符串将被传递作为LPCWSTR（注意常量部分）
至于字节数组，用ByVal替换ByRef - 数组将作为LPBYTE传递
- Alex Feinman
---
访问 http://www.opennetcf.org
Eric BOUXIROT < RI **** @ rickou.net>在消息中写道
新闻：41 ********************** @ news.free.fr ...
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那里，我正在开发一个关于VB.NET的智能应用程序项目。我必须调用API
（自定义eVC ++ DLL），但我对mashalas属性有一些麻烦.....
我已经在msdn帮助上复制/过去了一个样本但是它没有工作.. < IDE说未知'mashalAs''属性'.....我不知道为什么......
我在正常情况下尝试完全相同的代码windows项目和
工作（编译）很好......
我不知道我错过了什么....
这里有些我的代码行...
非常感谢...
Imports System.Runtime.InteropServices
Public Class Form1
公共声明函数F_BDO_MessageBoxOK LibPDA_BDO.dll （ByRef
IN_title（）As Byte，< MarshalAs（UnmanagedType.LPStr）> ByRef IN_msg As
String）As Int32
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
这篇关于VB.NET和eVC ++之间的互操作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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