c u盤使用記錄 C 檢測是否有u盤插入的方法

該c#**可監控是否有u盤插入，同時可以監控其它驅動器的變化

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

public partial class form1 : form

public form1()

initializecomponent();

[structlayout(layoutkind.sequential)]

public struct dev_broadcast_volume

public int dbcv_size;

public int dbcv_devicetype;

public int dbcv_reserved;

public int dbcv_unitmask;

protected override void wndproc(ref message m)

// 發生裝置變動

const int wm_devicechange = 0x0219;

// 系統檢測到乙個新裝置

const int dbt_devicearrival = 0x8000;

// 系統完成移除乙個裝置

const int dbt_deviceremovecomplete = 0x8001;

// 邏輯卷標

const int dbt_devtyp_volume = 0x00000002;

switch (m.msg)

case wm_devicechange:

switch (m.wparam.toint32())

case dbt_devicearrival:

int devtype = marshal.readint32(m.lparam, 4);

if (devtype == dbt_devtyp_volume)

dev_broadcast_volume vol;

vol = (dev_broadcast_volume)marshal.ptrtostructure(

m.lparam, typeof(dev_broadcast_volume));

messagebox.show(vol.dbcv_unitmask.tostring("x"));

break;

case dbt_deviceremovecomplete:

messagebox.show("removal");

break;

break;

base.wndproc(ref m);

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