您的位置：程序门 -> .net技术 -> c#

郁闷死,没错呀.....关于调用c++写的.dll

[收藏此页] [打印本页]选择字色：背景色：字体：[大][中][小]

郁闷死,没错呀.....关于调用c++写的.dll[已结贴,结贴人:cs920]

发表于：2007-01-26 21:30:44 楼主

我是从vb中改过来的,原vb写法:
////////bas
attribute vb_name = "module1 "
option explicit

declare function loadlibrary lib "kernel32 " alias "loadlibrarya " （byval lplibfilename as string) as long
declare function getprocaddress lib "kernel32 " （byval hmodule as long, byval lpprocname as string) as long
declare function setwindowshookex lib "user32 " alias "setwindowshookexa " （byval idhook as long, byval lpfn as long, byval hmod as long, byval dwthreadid as long) as long

public const wh_cbt = 5
////////frm
option explicit

private sub form_load（)

dim hhookdll as long
dim phookfunction as long
dim hsystemhook as long

app.taskvisible = false

hhookdll = loadlibrary（ "stickyapp32.dll ")

if hhookdll = 0 then
msgbox "could not locate stickyapp32.dll ", vbokonly or vbcritical, "stickyapp32 "
end
end if

phookfunction = getprocaddress（hhookdll, "hookfunction ")
hsystemhook = setwindowshookex（wh_cbt, phookfunction, hhookdll, 0)

end sub

private sub form_unload（cancel as integer)
cancel = true
end sub

//////////////////////////////////csharp
=====================我写的:
using system;
using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.text;
using system.windows.forms;
using system.runtime.interopservices;//这是用到dllimport时候要引入的包

namespace windowsapplication4
{

public partial class form1 : form
{
const int wh_cbt = 5;
[dllimport（ "kernel32 ", entrypoint = "getprocaddress ", setlasterror = true)]
public static extern intptr getprocaddress（intptr hmodule, string lpprocname);
[dllimport（ "kernel32 ", entrypoint = "loadlibrary ", setlasterror = true)]
public static extern intptr loadlibrary（string lplibname);
[dllimport（ "user32.dll ", charset = charset.auto)]
public static extern intptr setwindowshookex（int type, intptr hook, intptr instance, int threadid);
public form1（)
{
initializecomponent（);
}

private void form1_load（object sender, eventargs e)
{

intptr hhookdll, hsystemhook, phookfunction;
hhookdll = loadlibrary（ "stickyapp32.dll ");
if （hhookdll.toint32（) == 0)
{
messagebox.show（ "加载资源失败 ");
application.exitthread（);
}
phookfunction = getprocaddress（hhookdll, "hookfunction ");
hsystemhook = setwindowshookex（wh_cbt, phookfunction, hhookdll, 0);

}
private void form1_formclosing（object sender, formclosingeventargs e)
{
e.cancel = true;
}
}
///////////////////////////////////////
为什么我写的没用????????但hhookdll, hsystemhook, phookfunction
都有值> ??????????????????

发表于：2007-01-26 22:03:111楼得分:5

为什么我写的没用????????但hhookdll, hsystemhook, phookfunction
都有值> ??????????????????
------------------------------
what 's your matter?

发表于：2007-01-27 00:30:072楼得分:5

给了 0 初始值，看看结果如何。

发表于：2007-01-27 10:16:213楼得分:0

你用vb测试可以成功吗?

发表于：2007-01-27 10:30:584楼得分:0

是不是这里的原因?? "alias "loadlibrarya "...

对vb不了解...

发表于：2007-01-27 11:15:345楼得分:0

vb测试成功~

发表于：2007-01-27 11:16:446楼得分:0

回复:shrinerain（圣影雨)
hhookdll, hsystemhook, phookfunction
都有值
程序执行了,且无异常,但是没有效果~!!!

发表于：2007-01-27 12:44:247楼得分:70

我刚测试了一下,得到的hhookdll的值为0..

那你vb执行后是什么效果呢?

发表于：2007-01-28 19:16:128楼得分:15

ok, i got it.

notice:

setwindowshookex（wh_cbt, phookfunction, hhookdll, 0);
1.the 2nd parameter "phookfunction " must be a delegate, not a function pointer.
2.the 3rd parameter "hhookdll " must be a self handle. because .net can 't hook global message except "wh_keyboard_ll " and "wh_mouse_ll ". so if you want to hook wh_cbt, the 3rd parameter must be a self handle. use "marshal.gethinstance（assembly.getＥＸＥＣutingassembly（).manifestmodule); " if you want set a global hook, please use c++ or vb.

ps: only "wh_keyboard_ll " and "wh_mouse_ll " can be global hook in .net

下一篇：开发者交流群 - 309673 （目前尚未满进入后请按规定格式改名否则t出）
上一篇：winform 按键问题

其他资讯