[code cpp]
#include
#pragma hdrstop
#include
#include
#include
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
AnsiString dd1;
bool GetDriveGeometry(DISK_GEOMETRY *pdg)
{
HANDLE hDevice; // handle to the drive to be examined
BOOL bResult; // results flag
DWORD junk; // discard results
hDevice = CreateFile("\\\\.\\PhysicalDrive0", // drive to open
0, // no access to the drive
FILE_SHARE_READ | // share mode
FILE_SHARE_WRITE,
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // do not copy file attributes
if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
{
return (FALSE);
}
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform
NULL, 0, // no input buffer
pdg, sizeof(*pdg), // output buffer
&junk, // # bytes returned
(LPOVERLAPPED) NULL); // synchronous I/O
CloseHandle(hDevice); //drive clos
return (bResult);
}
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
DISK_GEOMETRY pdg; // disk drive geometry structure
BOOL bResult; // generic results flag
ULONGLONG DiskSize; // size of the drive, in bytes
long d1;
bResult = GetDriveGeometry (&pdg);

if (bResult){
Edit1->Text =pdg.Cylinders.QuadPart; //柱面數
Edit2->Text = pdg.TracksPerCylinder; //每柱面的磁道數
Edit3->Text = pdg.SectorsPerTrack ;
Edit4->Text = pdg.BytesPerSector;
DiskSize = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
(ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
d1 = DiskSize /(1024*1024);
Edit5->Text = IntToStr(d1) " bytes ";
}else{
Edit5->Text = "GetDriveGeometry failed. Error %ld.\n", GetLastError ();
}
}
[/code]
把以GetDriveGeometry(DISK_GEOMETRY *pdg)裡面的內容放到Button2裡面~
但是Button1裡面的
Edit1->Text =pdg.Cylinders.QuadPart; //柱面數
Edit2->Text = pdg.TracksPerCylinder; //每柱面的磁道數
Edit3->Text = pdg.SectorsPerTrack ; Edit4->Text = pdg.BytesPerSector; 都無法顯示了 有誰能教我該怎麼辦呢?

------
May I ask you something ?

編輯記錄

一、看不太懂你的問題，我依照你所提供的程式照key了一番，程式正常執行，沒有問題。Edit1~Edit5都有文字出現
二、你所說的button2是要放什麼東西咧？
三、下次在放程式碼的時候請盡量加上程式碼區塊喔！(「半形」的【code cpp】請在此區域輸入程式碼【/code】)
我把程式碼整理一下…
[code cpp]
//---------------------------------------------------------------------------

#include
#pragma hdrstop
#include "winioctl.h"
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
AnsiString dd1;
bool GetDriveGeometry(DISK_GEOMETRY *pdg)
{
HANDLE hDevice; // handle to the drive to be examined
BOOL bResult; // results flag
DWORD junk; // discard results
hDevice = CreateFile("\\\\.\\PhysicalDrive0", // drive to open
0, // no access to the drive
FILE_SHARE_READ | // share mode
FILE_SHARE_WRITE,
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // do not copy file attributes
if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
{
return (FALSE);
}
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform
NULL, 0, // no input buffer
pdg, sizeof(*pdg), // output buffer
&junk, // # bytes returned
(LPOVERLAPPED) NULL); // synchronous I/O
CloseHandle(hDevice); //drive clos
return (bResult);
}
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
DISK_GEOMETRY pdg; // disk drive geometry structure
BOOL bResult; // generic results flag
ULONGLONG DiskSize; // size of the drive, in bytes
long d1;
bResult = GetDriveGeometry (&pdg);

if (bResult){
Edit1->Text = pdg.Cylinders.QuadPart; //柱面數
Edit2->Text = pdg.TracksPerCylinder; //每柱面的磁道數
Edit3->Text = pdg.SectorsPerTrack ; // 每磁道的扇區數
Edit4->Text = pdg.BytesPerSector; // 每扇區的字節數
DiskSize = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
(ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
d1 = DiskSize /(1024*1024);
Edit5->Text = IntToStr(d1) " bytes ";
}else{
Edit5->Text = "GetDriveGeometry failed. Error %ld.\n", GetLastError ();
}
}
//---------------------------------------------------------------------------
[/code]

我是想把Butto2放著樣:

[code cpp]
HANDLE hDevice; // handle to the drive to be examined
BOOL bResult; // results flag
DWORD junk; // discard results
hDevice = CreateFile("\\\\.\\PhysicalDrive0", // drive to open
0, // no access to the drive
FILE_SHARE_READ | // share mode
FILE_SHARE_WRITE,
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // do not copy file attributes
if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
{

}
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform
NULL, 0, // no input buffer
pdg, sizeof(*pdg), // output buffer
&junk, // # bytes returned
(LPOVERLAPPED) NULL); // synchronous I/O
CloseHandle(hDevice); //drive clos



[/code]

如果著樣放Button1裡面的
Edit1->Text =pdg.Cylinders.QuadPart; //柱面數
Edit2->Text = pdg.TracksPerCylinder; //每柱面的磁道數
Edit3->Text = pdg.SectorsPerTrack ; Edit4->Text = pdg.BytesPerSector;
都無法顯示 ~ 因為我想用ComboBox取代CreateFile裡面的\\\\.\\PhysicalDrive0的值
想把他改成ComboBox可以點選的比較方面 ~ 所以想把CreateFile跟DeviceIoControl放在不同的button裡面

但是如果我把分開DISK_GEOMETRY *pdg值就不知道該怎麼用了

------
May I ask you something ?

編輯記錄

區域變數出函式後就被清掉啦…
用ComboBox來替代原來的句子也ok啊，在combobox的oncloseup中檢查選定的項目，再把對應的內容導到一個變數帶進去，這樣應該就可以解決你的問題了。

我改成著樣子執行起來便怪怪的呢!!   QQ

[code cpp]
#include
#pragma hdrstop
#include
#include
#include
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
DISK_GEOMETRY *pdg;
HANDLE hDevice; // handle to the drive to be examined ****這這這
BOOL bResult; // results flag
DWORD junk; // discard results
bool GetDriveGeometry(DISK_GEOMETRY *pdg)
{
if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
{
return (FALSE);
}
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform
NULL, 0, // no input buffer
pdg, sizeof(*pdg), // output buffer
&junk, // # bytes returned
(LPOVERLAPPED) NULL); // synchronous I/O
return (bResult);
}
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn2Click(TObject *Sender)
{
DISK_GEOMETRY pdg; // disk drive geometry structure
BOOL bResult;
// generic results flag
ULONGLONG DiskSize; // size of the drive, in bytes
long d1;
hDevice = ComboBox1->Text.c_str() ; //*********這這這


if (bResult){
Edit1->Text = pdg.Cylinders.QuadPart; //柱面數
Edit2->Text = pdg.TracksPerCylinder; //每柱面的磁道數
Edit3->Text = pdg.SectorsPerTrack ;
Edit4->Text = pdg.BytesPerSector;
DiskSize = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
(ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
d1 = DiskSize /(1024*1024);
Edit5->Text = IntToStr(d1) " bytes ";
}
else
{
Edit5->Text = "GetDriveGeometry failed. Error %ld.\n", GetLastError ();
}

}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn1Click(TObject *Sender)
{
CloseHandle(hDevice);
ShowMessage("Close");
//
}
//---------------------------------------------------------------------------
[/code]

------
May I ask you something ?

編輯記錄

為什麼不用全域變數來放"\\\\.\\PhysicalDrive0"的內容呢？
然後用你的button2來呼叫GetDriveGeometry(DISK_GEOMETRY *pdg)，原來函式的"\\\\.\\PhysicalDrive0"再用所宣告的全域變數取代，這樣不就省事點了嗎？
另外，我發現全部相乘後，得到的值應該是MByte的樣子…(如果是我誤解，再麻煩糾正)

全域變數釋放的位置嗎?
[code cpp]
class TForm1 : public TForm
{
__published: // IDE-managed Components
TBitBtn *BitBtn1;
TBitBtn *BitBtn2;
TEdit *Edit1;
TEdit *Edit2;
TEdit *Edit3;
TEdit *Edit4;
TEdit *Edit5;
TComboBox *ComboBox1;
void __fastcall BitBtn2Click(TObject *Sender);
void __fastcall BitBtn1Click(TObject *Sender);
private: // User declarations
public: // User declarations
__fastcall TForm1(TComponent* Owner);
HANDLE hDevice; //放在著嗎?
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif

[/code]

------
May I ask you something ?

位置對了，只是放的程式不太對，我相信你應該有看到這篇文章：
實戰DeviceIoControl 之一：通過API訪問設備驅動程序

而driver0、1...或是c:、d:等該設在哪邊可以在這篇找到相關資訊

加油！快完成嚕！
===================引 用 MVP2000 文 章===================
全域變數釋放的位置嗎?
[code cpp]
class TForm1 : public TForm
{
__published: // IDE-managed Components
TBitBtn *BitBtn1;
TBitBtn *BitBtn2;
TEdit *Edit1;
TEdit *Edit2;
TEdit *Edit3;
TEdit *Edit4;
TEdit *Edit5;
TComboBox *ComboBox1;
void __fastcall BitBtn2Click(TObject *Sender);
void __fastcall BitBtn1Click(TObject *Sender);
private: // User declarations
public: // User declarations
__fastcall TForm1(TComponent* Owner);
HANDLE hDevice; //放在著嗎?
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif

[/code]

阿 中標  頭腦完全打結中 恩恩  那邊我也有看

那是要用typedef struct宣告在裡面嗎?


[code cpp]
const char *szDevName[]=
{
"\\\\.\\A:",
"\\\\.\\B:",
"\\\\.\\PhysicalDrive0",
"\\\\.\\PhysicalDrive1",
"\\\\.\\PhysicalDrive2",
"\\\\.\\PhysicalDrive3",
"\\\\.\\Cdrom0",
"\\\\.\\Cdrom1",
};
CEdit& Edit = GetEditCtrl();
Edit.SetWindowText(strMsg);
// 打開設備
hDisk = ::CreateFile(filename, // 文件名
GENERIC_READ | GENERIC_WRITE, // 讀寫方式
FILE_SHARE_READ | FILE_SHARE_WRITE, // 共享方式
NULL, // 默認的安全描述符
OPEN_EXISTING, // 創建方式
0, // 不需設置文件屬性
NULL); // 不需參照模板文件
[/code]

------
May I ask you something ?

你不是要用combobox來處理嗎..........？
[code cpp]
ComboBox1->Items->Add("\\\\.\\PhysicalDrive0");
.
.
.
[/code]
===================引 用 MVP2000 文 章===================
阿 中標 頭腦完全打結中 恩恩 那邊我也有看

那是要用typedef struct宣告在裡面嗎...

恩 我要用ComboBox用 因為我看裡面的範例 我只看到面的結構
所以打結不知道 怎麼用 因為用HANDLE hDevice; 之後

Edit1->Text = pdg.Cylinders.QuadPart; //柱面數
Edit2->Text = pdg.TracksPerCylinder; //每柱面的磁道數
Edit3->Text = pdg.SectorsPerTrack ;
Edit4->Text = pdg.BytesPerSector;
都取不到值了
[code cpp]

TForm1 *Form1;
DISK_GEOMETRY *pdg;
// handle to the drive to be examined
BOOL bResult; // results flag
DWORD junk; // discard results
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn2Click(TObject *Sender)
{
DISK_GEOMETRY pdg; // disk drive geometry structure
BOOL bResult;
// generic results flag
ULONGLONG DiskSize; // size of the drive, in bytes
long d1;
hDevice = ComboBox1->Text.c_str() ;


if (bResult){
Edit1->Text = pdg.Cylinders.QuadPart; //柱面數
Edit2->Text = pdg.TracksPerCylinder; //每柱面的磁道數
Edit3->Text = pdg.SectorsPerTrack ;
Edit4->Text = pdg.BytesPerSector;
DiskSize = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
(ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
d1 = DiskSize /(1024*1024);
Edit5->Text = IntToStr(d1) " bytes ";
}
else
{
Edit5->Text = "GetDriveGeometry failed. Error %ld.\n", GetLastError ();
}

}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn1Click(TObject *Sender)
{


ShowMessage("Close");
//
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn3Click(TObject *Sender)
{
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform
NULL, 0, // no input buffer
pdg, sizeof(*pdg), // output buffer
&junk, // # bytes returned
(LPOVERLAPPED) NULL); // synchronous I/O
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn4Click(TObject *Sender)
{
CloseHandle(hDevice);
}
//---------------------------------------------------------------------------


[/code]

------
May I ask you something ?

hDevice是要放很多東西的…
[code cpp]
hDevice = CreateFile( Edit1->Text, // drive to open
0, // no access to the drive
FILE_SHARE_READ | // share mode
FILE_SHARE_WRITE,
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // do not copy file attributes
[/code]

看出哪裡不一樣了嗎？

編輯記錄

換記放CreateFile QQ 可是改了之後  可是我著樣子執行後還是有錯誤  是為什麼阿?  (很不好意思  都一值麻煩你的說)


[code cpp]
//---------------------------------------------------------------------------
#include
#pragma hdrstop
#include
#include
#include
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
DISK_GEOMETRY *pdg;
// handle to the drive to be examined
BOOL bResult; // results flag
DWORD junk; // discard results
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn2Click(TObject *Sender)
{
DISK_GEOMETRY pdg; // disk drive geometry structure
BOOL bResult;
// generic results flag
ULONGLONG DiskSize; // size of the drive, in bytes
long d1;
hDevice = ComboBox1->Text.c_str() ;


if (bResult){
Edit1->Text = pdg.Cylinders.QuadPart; //柱面數
Edit2->Text = pdg.TracksPerCylinder; //每柱面的磁道數
Edit3->Text = pdg.SectorsPerTrack ;
Edit4->Text = pdg.BytesPerSector;
DiskSize = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
(ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
d1 = DiskSize /(1024*1024);
Edit5->Text = IntToStr(d1) " bytes ";
}
else
{
Edit5->Text = "GetDriveGeometry failed. Error %ld.\n", GetLastError ();
}

}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn1Click(TObject *Sender)
{

CloseHandle(hDevice);

ShowMessage("Close");
//
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn3Click(TObject *Sender)
{
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform
NULL, 0, // no input buffer
pdg, sizeof(*pdg), // output buffer
&junk, // # bytes returned
(LPOVERLAPPED) NULL); // synchronous I/O
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn4Click(TObject *Sender)
{

hDevice = CreateFile(ComboBox1->Text.c_str(), // drive to open
0, // no access to the drive
FILE_SHARE_READ | // share mode
FILE_SHARE_WRITE,
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // do not copy file attributes
}
//---------------------------------------------------------------------------
[/code]

------
May I ask you something ?

哈哈
我剛剛試過後才知道，ansistring轉char之後，還真的出不來哩，不知道是哪裡的問題。
所以我用了另一個折衷的方法
利用switch來偵測combobox->itemindex
以下是程式片斷
[code cpp]
char *a;
switch(ComboBox1->ItemIndex){
case 1:
a = "\\\\.\\PhysicalDrive0";
case 2:
a = "\\\\.\\PhysicalDrive1";
}
[/code]
這樣combobox的items也可改為「硬盤1」、「硬盤2」之類的名字。

(我想，應該已經一堆高手在螢幕前笑翻天了吧，哈哈)

抱歉我在耍白吃 ~ 竟然不知道自己在搞什麼(頭暈腦漲) 看下面
[code cpp]
//---------------------------------------------------------------------------
#include
#pragma hdrstop
#include
#include
#include
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
DISK_GEOMETRY *pdg;
// handle to the drive to be examined
BOOL bResult; // results flag
DWORD junk; // discard results
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn2Click(TObject *Sender)
{
DISK_GEOMETRY pdg;
BOOL bResult;
ULONGLONG DiskSize;
long d1;
hDevice = ComboBox1->Text.c_str() ; ///<<<<<<<<<<<<<<<<著裡


if (bResult){
Edit1->Text = pdg.Cylinders.QuadPart;
Edit2->Text = pdg.TracksPerCylinder;
Edit3->Text = pdg.SectorsPerTrack ;
Edit4->Text = pdg.BytesPerSector;
DiskSize = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
(ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
d1 = DiskSize /(1024*1024);
Edit5->Text = IntToStr(d1) " bytes ";
}
else
{
Edit5->Text = "GetDriveGeometry failed. Error %ld.\n", GetLastError ();
}

}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn1Click(TObject *Sender)
{

CloseHandle(hDevice);

ShowMessage("Close");
//
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn3Click(TObject *Sender)
{
bResult = DeviceIoControl(hDevice,
IOCTL_DISK_GET_DRIVE_GEOMETRY,
NULL, 0,
pdg, sizeof(*pdg),
&junk, // # bytes returned
(LPOVERLAPPED) NULL);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn4Click(TObject *Sender)
{

hDevice = CreateFile(ComboBox1->Text.c_str(), // drive to open <<<<<<<<<<<<<<<<<<著裡
0,
FILE_SHARE_READ |
FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);
}
//---------------------------------------------------------------------------
[/code]


改完之後 只出現pdg.BytesPerSector的值 其他的值都沒有顯示

[code cpp]

//---------------------------------------------------------------------------
#include
#pragma hdrstop
#include
#include
#include
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
DISK_GEOMETRY *pdg;
// handle to the drive to be examined
BOOL bResult; // results flag
DWORD junk; // discard results
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn2Click(TObject *Sender)
{
DISK_GEOMETRY pdg; // disk drive geometry structure
BOOL bResult;
// generic results flag
ULONGLONG DiskSize; // size of the drive, in bytes
long d1;



if (bResult){
Edit1->Text = pdg.Cylinders.QuadPart; //柱面數
Edit2->Text = pdg.TracksPerCylinder; //每柱面的磁道數
Edit3->Text = pdg.SectorsPerTrack ;
Edit4->Text = pdg.BytesPerSector;
DiskSize = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
(ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
d1 = DiskSize /(1024*1024);
Edit5->Text = IntToStr(d1) " bytes ";
}
else
{
Edit5->Text = "GetDriveGeometry failed. Error %ld.\n", GetLastError ();
}

}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn1Click(TObject *Sender)
{

CloseHandle(hDevice);

ShowMessage("Close");
//
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn4Click(TObject *Sender)
{
char *a;
switch(ComboBox1->ItemIndex){
case 1:
a = "\\\\.\\PhysicalDrive0";
case 2:
a = "\\\\.\\PhysicalDrive1";
}
hDevice = CreateFile(a, // drive to open
0, // no access to the drive
FILE_SHARE_READ | // share mode
FILE_SHARE_WRITE,
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // do not copy file attributes
bResult = DeviceIoControl(hDevice, // device to be queried
IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform
NULL, 0, // no input buffer
pdg, sizeof(*pdg), // output buffer
&junk, // # bytes returned
(LPOVERLAPPED) NULL); // synchronous I/O

}
//---------------------------------------------------------------------------

[/code]

------
May I ask you something ?

編輯記錄

先把程式改回原本的樣子，再將a取代"\\\\.\\PhysicalDrive0"，之後再看你的需求來做修改。

另外，既然你的問題是將「GetDriveGeometry(DISK_GEOMETRY *pdg)放Button2」，那button2的onclick事件為何不放「bResult = GetDriveGeometry (&pdg)」呢？原來的函式內容放到button2的目的是什麼？

恩 BUTTON是顯示要開啟的Device的資料

然後我是想加ComboBox來可以選擇要開啟的device 例如COM1~COM8 或者USB閘

------
May I ask you something ?