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急急急，在线求助！！[已结贴,结贴人:dsd999]

发表于：2007-03-06 13:57:24 楼主

1）原型
winsetupapi
bool
winapi
setupdisetclassinstallparamsa（
in hdevinfo deviceinfoset,
in psp_devinfo_data deviceinfodata, optional
in psp_classinstall_header classinstallparams, optional
in dword classinstallparamssize
);

[dllimport（ "setupapi.dll ", setlasterror = true, charset = charset.auto)]static extern bool setupdisetclassinstallparams（intptr deviceinfoset, ref sp_devinfo_data deviceinfodata, ref sp_classinstall_header classinstallparams, int classinstallparamssize);

2）typedef struct _sp_classinstall_header {
dword cbsize;
di_function installfunction;
} sp_classinstall_header, *psp_classinstall_header;

[structlayout（layoutkind.sequential)]
public struct sp_classinstall_header
{
public uint32 cbsize;
public uint installfunction;
}

3）typedef struct _sp_propchange_params {
sp_classinstall_header classinstallheader;
dword statechange;
dword scope;
dword hwprofile;
} sp_propchange_params, *psp_propchange_params;

[structlayout（layoutkind.sequential)]
public struct sp_propchange_params
{
public sp_classinstall_header classinstallheader;
public uint32 statechange;
public uint32 scope;
public uint32 hwprofile;
}

问题：
1）这几个写法是否有问题？
2）
sp_propchange_params sppropchangeparam = new sp_propchange_params（);
sppropchangeparam.scope = 0x00000001;
sppropchangeparam.statechange = 0;
sppropchangeparam.classinstallheader.cbsize = （uint32)system.runtime.interopservices.marshal.sizeof（sppropchangeparam.classinstallheader);
sppropchangeparam.classinstallheader.installfunction = 0x00000012;

setupdisetclassinstallparams（newdeviceinfoset, ref spdata, ref sppropchangeparam.classinstallheader, system.runtime.interopservices.marshal.sizeof（sppropchangeparam));

调用不成功，getlasterror错误值87（参数不正确)，哪里出问题了？
newdeviceinfoset和spdata参数应该没有问题。

谢谢

发表于：2007-03-06 14:30:121楼得分:20

from
http://www.devmedia.com.br/articles/viewcomp.asp?comp=4092&hl=
先看看别人是怎么用的

public const int digcf_present = 2;
public const int dif_propertychange = 0x00000012;
public const int dics_flag_global = 0x00000001;
public const int invalid_handle_value = -1;
public const int dics_enable = 0x00000001;
public const int dics_disable = 0x00000002;
public const string usbvidpid = @ "usb\vid_0403&pid_6001\a1000pra ";

[structlayout（layoutkind.sequential)]
public struct sp_classinstall_header
{
public int cbsize;
public int installfunction;
}

[structlayout（layoutkind.sequential)]
public struct sp_propchange_params
{
public sp_classinstall_header classinstallheader;
public int statechange;
public int scope;
public int hwprofile;
public void init（)
{
classinstallheader = new sp_classinstall_header（);
}
}

[structlayout（layoutkind.sequential)]
public struct sp_devinfo_data
{
public int cbsize;
public guid classguid;
public int devinst;
public int reserved;
}

[dllimport（ "setupapi.dll ")]
public static extern bool setupdienumdeviceinfo（
intptr deviceinfoset,
int supplies,
ref sp_devinfo_data deviceinfodata);

[dllimport（ "setupapi.dll ")]
public static extern bool setupdisetclassinstallparams（
intptr deviceinfoset,
ref sp_devinfo_data deviceinfodata,
ref sp_classinstall_header classinstallparams,
int classinstallparamssize);

[dllimport（ "setupapi.dll ")]
public static extern bool setupdicallclassinstaller（
int installfunction,
intptr deviceinfoset,
ref sp_devinfo_data deviceinfodata);

static bool statechange（int newstate, int selecteditem, intptr hdevinfo)
{
sp_propchange_params propchangeparams;
sp_devinfo_data deviceinfodata;
propchangeparams = new sp_propchange_params（);
propchangeparams.init（);
deviceinfodata = new sp_devinfo_data（);
propchangeparams.classinstallheader.cbsize
= marshal.sizeof（propchangeparams.classinstallheader);
deviceinfodata.cbsize = marshal.sizeof（deviceinfodata);
if （!setupdienumdeviceinfo（hdevinfo, selecteditem, ref deviceinfodata))
return false;

propchangeparams.classinstallheader.installfunction = dif_propertychange;
propchangeparams.scope = dics_flag_global;
propchangeparams.statechange = newstate;
if （!setupdisetclassinstallparams（
hdevinfo,
ref deviceinfodata,
ref propchangeparams.classinstallheader,
（int)marshal.sizeof（propchangeparams)))
return false;
if （!setupdicallclassinstaller（
dif_propertychange,
hdevinfo,
ref deviceinfodata))
return false;
return true;
}

发表于：2007-03-06 16:48:482楼得分:0

谢谢，问题出在sppropchangeparam.statechange = 0;

所以返回参数不正确。改成 sppropchangeparam.statechange = 1;就ok了

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