windows下C++编程,程序如何知道当前电脑是否插入了U盘？

[chen327684096]

当打开程序后,如果插入了U盘,程序自动在桌面上创建一个快捷方式,应该怎么做？
需要看哪方面的资料？

[find_]

你是说的360的那种吧，我觉得需要监听usb端口

[vuqrzk5w]

想深一点，如楼上据说，监听USB端口。 想浅一点实现，就在运行时看电脑有多少个盘符，定时检测，如果有多出来的，看看容量、特征，猜是不是U盘。

[chen327684096]

引用 1 楼 sun734274006 的回复:

你是说的360的那种吧，我觉得需要监听usb端口

对的,类似360那种,监听USB端口需要一直监听吗？

[chen327684096]

引用 2 楼 vuqrzk5w 的回复:

想深一点，如楼上据说，监听USB端口。 想浅一点实现，就在运行时看电脑有多少个盘符，定时检测，如果有多出来的，看看容量、特征，猜是不是U盘。

有没什么资料或者书籍有介绍这方面的编程？思路有了但不知道如何下手

[lm_whales]

监控相应的设备类，注册下一个消息就可以了

[赵4老师]

CWnd::OnDeviceChange
afx_msg BOOL OnDeviceChange( UINT nEventType, DWORD dwData );

Parameters

nEventType

An event type. See the Remarks section for a description of the available values

dwData

The address of a structure that contains event-specific data. Its meaning depends on the given event.

Remarks

The framework calls this member function to notify an application or device driver of a change to the hardware configuration of a device or the computer.

For devices that offer software-controllable features, such as ejection and locking, the operating system typically sends a DBT_DEVICEREMOVEPENDING message to let applications and device drivers end their use of the device gracefully. 

If the operating system forcefully removes of a device, it may not send a DBT_DEVICEQUERYREMOVE message before doing so.

The nEvent parameter can be one of these values: 

DBT_DEVICEARRIVAL   A device has been inserted and is now available. 


DBT_DEVICEQUERYREMOVE   Permission to remove a device is requested. Any application can deny this request and cancel the removal.


DBT_DEVICEQUERYREMOVEFAILED   Request to remove a device has been canceled.


DBT_DEVICEREMOVEPENDING   Device is about to be removed. Cannot be denied.


DBT_DEVICEREMOVECOMPLETE   Device has been removed.


DBT_DEVICETYPESPECIFIC   Device-specific event.


DBT_CONFIGCHANGED   Current configuration has changed.


DBT_DEVNODES_CHANGED   Device node has changed. 
Note   This member function is called by the framework to allow your application to handle a Windows message. The parameters passed to your function reflect the parameters received by the framework when the message was received. If you call the base-class implementation of this function, that implementation will use the parameters originally passed with the message and not the parameters you supply to the function.

CWnd Overview |  Class Members |  Hierarchy Chart

See Also   WM_DEVICECHANGE