Using APIs to implement C # hardware control (I)

Recently, in the project process, it involves enabling and disabling hardware (hardware can be enabled within a specified period of time ). Because C #'s hardware operations are basically zero, so I searched for the device-related API functions in msdn. There is indeed. The following lists the prototype of each function and related instructions. And convert it into C # code implementation.

Function 1: registerdevicenotification
Function: registers a device or device type. Related Information is returned in the specified window.

Prototype:

Hdevnotify winapi registerdevicenotification (
_ In handle hrecipient,
_ In lpvoid icationicationfilter,
_ In DWORD flags
);

Reference: http://msdn2.microsoft.com/en-us/library/aa363431.aspx.

The code after converting to C # is:

[Dllimport ("user32.dll", charset = charset. Auto)]

Public static extern intptr registerdevicenotification (intptr
Hrecipient, dev_broadcast_deviceinterface icationicationfilter, uint32
Flags );
[Structlayout (layoutkind. Sequential)]
Public class dev_broadcast_deviceinterface
...{
Public int dbcc_size;
Public int dbcc_devicetype;
Public int dbcc_reserved;
}

Function 2: unregisterdevicenotification
Function: disables the information of a specified device through the name handle. (Mainly used to clear unmanaged resources and pair them with registerdevicenotification)

Prototype:

Bool winapi unregisterdevicenotification (
_ In hdevpolicy handle
);

Reference documentation: http://msdn2.microsoft.com/en-us/library/aa363475 (vs.85). aspx.

Code converted to C:

[Dllimport ("user32.dll", charset = charset. Auto)]
Public static extern uint unregisterdevicenotification (intptr hhandle );

Function 3: setupdigetclassdevs
Function: obtains information about all installed devices of a specified category or all categories.

Prototype:

Hdevinfo setupdigetclassdevs (in lpguid classguid, optional
In pctstr enumerator, optional in hwnd hwndparent, optional
In DWORD flags );
Reference: http://msdn2.microsoft.com/en-us/library/ms792959.aspx.

Code converted to C:

[Dllimport ("setupapi. dll", setlasterror = true)]
Public static extern intptr setupdigetclassdevs (ref guid gclass, uint32 ienumerator, intptr hparent, uint32 nflags );

Function 4: setupdidestroydeviceinfolist
Function: destroys a collection of device information and releases all associated memory.

Prototype:

Winsetupapi bool winapi setupdidestroydeviceinfolist (in hdevinfo deviceinfoset );
Reference: http://msdn2.microsoft.com/en-us/library/ms792991.aspx.

Code converted to C:

[Dllimport ("setupapi. dll", setlasterror = true)]
Public static extern int setupdidestroydeviceinfolist (intptr lpinfoset );

Function 5: setupdienumdeviceinfo
Function: enumerate the members of a specified device information set and place the data in sp_devinfo_data.

Prototype:

Winsetupapi bool winapi setupdienumdeviceinfo (
In hdevinfo deviceinfoset,
In DWORD memberindex,
Out psp_devinfo_data deviceinfodata );
Reference: http://msdn2.microsoft.com/en-us/library/ms792983.aspx.

Code converted to C:

[Dllimport ("setupapi. dll", setlasterror = true)]
Public static extern bool setupdienumdeviceinfo (intptr lpinfoset, uint32 dwindex, sp_devinfo_data devinfodata );
/** // <Summary>
/// Device information data
/// </Summary>
[Structlayout (layoutkind. Sequential)]
Public class sp_devinfo_data
...{
Public int cbsize;
Public guid classguid;
Public int devinst;
Public ulong reserved;
};

Function 6: setupdigetdeviceregistryproperty
Function: gets the properties of a specified device.

Prototype:

Winsetupapi bool winapi setupdigetdeviceregistryproperty (
In hdevinfo deviceinfoset,
In psp_devinfo_data deviceinfodata,
In DWORD property,
Out pdword propertyregdatatype,
Optional out pbyte propertybuffer,
In DWORD propertybuffersize,
Out pdword requiredsize optional );
Reference: http://msdn2.microsoft.com/en-us/library/ms792967.aspx.

Code converted to C:

[Dllimport ("setupapi. dll", setlasterror = true)]

Public static extern bool setupdigetdeviceregistryproperty (intptr
Lpinfoset, sp_devinfo_data deviceinfodata, uint32 property, uint32
Propertyregdatatype, stringbuilder propertybuffer, uint32
Propertybuffersize, intptr requiredsize );

Function 7: setupdisetclassinstallparams
Function: Disable a device.

Prototype:

Winsetupapi bool winapi
Setupdisetclassinstallparams (
In hdevinfo deviceinfoset,
In psp_devinfo_data deviceinfodata,
Optional in psp_classinstall_header classinstallparams,
Optional in DWORD classinstallparamssize );
Reference: http://msdn2.microsoft.com/en-us/library/ms792876.aspx.

Code converted to C:

[Dllimport ("setupapi. dll", setlasterror = true, charset = charset. Auto)]

Public static extern bool setupdisetclassinstallparams (intptr
Deviceinfoset, intptr deviceinfodata, intptr classinstallparams, int
Classinstallparamssize );

Function 8: setupdicallclassinstaller
Function: Enable the device.

Prototype:

Winsetupapi bool winapi
Setupdicallclassinstaller (
In di_function installfunction,
In hdevinfo deviceinfoset,
In psp_devinfo_data deviceinfodata optional );
Reference: http://msdn2.microsoft.com/en-us/library/ms792989.aspx.

Code converted to C:

[Dllimport ("setupapi. dll", charset = charset. Auto)]

Public static extern Boolean setupdicallclassinstaller (uint32
Installfunction, intptr deviceinfoset, intptr deviceinfodata );