中财网遮天叶凡与石昊的关系:Delphi自动检测U盘插入、拔出及获取U盘盘符!
来源：百度文库 编辑：中财网 时间：2024/05/09 09:38:27
//检测U盘插入、拔出
测试通过
1、新建工程；
2、定义一个私有过程
procedure WMDeviceChange(var Msg: TMessage); message WM_DEVICECHANGE;
完整代码如下：
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, AppEvnts, ExtCtrls, StdCtrls;
type
TForm1 = class(TForm)
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
procedure WMDeviceChange(var Msg: TMessage); message WM_DEVICECHANGE;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.WMDeviceChange (var Msg: TMessage);
var
myMsg : String;
begin
Case Msg.WParam of
32768:
begin
myMsg :='U盘插入';
MessageBox(0,'注意!U盘已插入!!!','AutoCopy Information',MB_ICONASTERISK and MB_ICONINFORMATION);
end;
32772:
begin
myMsg :='U盘拔出';
MessageBox(0,'注意!U盘已取走!!!','AutoCopy Information',MB_ICONASTERISK and MB_ICONINFORMATION);
end;
end;
end;
===========================================
// 取U盘盘符代码
使用delphi程序实现U盘盘符的获取其实不是很难，不过对于新手来说可能有点困难，把代码贴出来，供大家学习
============================================
procedure TForm1.Button1Click(Sender: TObject);
var
buf:array [0..MAX_PATH-1] of char;
m_Result:Integer;
i:Integer;
str_temp:string;
begin
m_Result:=GetLogicalDriveStrings(MAX_PATH,buf);
for i:=0 to (m_Result div 4) do
begin
str_temp:=string(buf[i*4]+buf[i*4+1]+buf[i*4+2]);
if GetDriveType(pchar(str_temp)) = DRIVE_REMOVABLE then
begin
ShowMessage(str_temp+'盘为U盘');
ListBox1.Items.Add(str_temp);
end;
end;
end;
=========================================//磁盘类型常量参考
DRIVE_UNKNOWN = 0;
{$EXTERNALSYM DRIVE_UNKNOWN}
DRIVE_NO_ROOT_DIR = 1;
{$EXTERNALSYM DRIVE_NO_ROOT_DIR}
DRIVE_REMOVABLE = 2;
{$EXTERNALSYM DRIVE_REMOVABLE}
DRIVE_FIXED = 3;
{$EXTERNALSYM DRIVE_FIXED}
DRIVE_REMOTE = 4;
{$EXTERNALSYM DRIVE_REMOTE}
DRIVE_CDROM = 5;
{$EXTERNALSYM DRIVE_CDROM}
DRIVE_RAMDISK = 6;
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