如何得到USB设备的插拔消息

zhangjj2 2004-10-07 09:28:01

怎样才能在USB设备的插拔时，程序能够得到通知

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Mr-Chen 2005-06-22

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http://website.9team.com/3871/3871176.htm

老夏Max 2005-06-22

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http://community.csdn.net/Expert/topic/4081/4081250.xml?temp=.6566736

wildwind_ssj 2005-04-07

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Thanks wlzqi(wlzqi)

newbikiki 2004-10-14

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给我一份：tsh3000@163.com

shadowWind 2004-10-12

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mark

fengnanman 2004-10-11

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楼上的，能不能也给我一份，fengnan_man@163.com
先谢谢了。

wlzqi 2004-10-11

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重载WindowProc

LRESULT CXXXXDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
// TODO: 在此添加专用代码和/或调用基类
switch(message)
{
case WM_DEVICECHANGE:
{
if (wParam==32768)//发现USB设备
{
发现USB设备
}
}break;

}
return CDialog::WindowProc(message, wParam, lParam);
}

arran9317 2004-10-10

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楼上的，能不能给俺也给一份，arran_99325@163.com
谢谢了！！！

Cocoky 2004-10-10

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WM_DEVICECHANGE

The WM_DEVICECHANGE device message notifies an application of a change to the hardware configuration of a device or the computer.

A window receives this message through its WindowProc function.

LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // WM_DEVICECHANGE
WPARAM wParam, // device-change event
LPARAM lParam // event-specific data
);
Parameters
wParam
Event that has occurred. This parameter can be one of the following values. Value Meaning
DBT_CONFIGCHANGECANCELED A request to change the current configuration (dock or undock) has been canceled.
DBT_CONFIGCHANGED The current configuration has changed, due to a dock or undock.
DBT_CUSTOMEVENT A custom event has occurred.

Windows NT 4.0 and Windows 95: This value is not supported.

DBT_DEVICEARRIVAL A device or piece of media has been inserted and is now available.
DBT_DEVICEQUERYREMOVE Permission is requested to remove a device or piece of media. Any application can deny this request and cancel the removal.
DBT_DEVICEQUERYREMOVEFAILED A request to remove a device or piece of media has been canceled.
DBT_DEVICEREMOVECOMPLETE A device or piece of media has been removed.
DBT_DEVICEREMOVEPENDING A device or piece of media is about to be removed. Cannot be denied.
DBT_DEVICETYPESPECIFIC A device-specific event has occurred.
DBT_DEVNODES_CHANGED A device has been added to or removed from the system.

Windows NT 4.0 and Windows Me/98/95: This value is not supported.

DBT_QUERYCHANGECONFIG Permission is requested to change the current configuration (dock or undock).
DBT_USERDEFINED The meaning of this message is user-defined.

lParam
Pointer to a structure that contains event-specific data. Its format depends on the value of the wParam parameter. For more information, refer to the documentation for each event.
Return Values
Return TRUE to grant the request.

Return BROADCAST_QUERY_DENY to deny the request.

Remarks
For devices that offer software-controllable features, such as ejection and locking, the system typically sends a DBT_DEVICEREMOVEPENDING message to let applications and device drivers end their use of the device gracefully. If the system forcibly removes a device, it may not send a DBT_DEVICEQUERYREMOVE message before doing so.

Requirements
Client: Included in Windows XP, Windows 2000 Professional, Windows NT Workstation 4.0, Windows Me, Windows 98, and Windows 95.
Server: Included in Windows Server 2003, Windows 2000 Server, and Windows NT Server 4.0.
Header: Declared in Winuser.h; include Windows.h.

yo_jo 2004-10-10