BCB中需要作下面準備工作
1.在C++ Builder 6 中C:\Program Files\Borland\CBuilder6\Lib\Psdk\SetupAPI.LIB 加入您的Project File
2.#include  
  #include 
  #include 
 
在你的Project Unit1中...

//.cpp
#include 
#pragma hdrstop
#include  // DDK SetupAPI API include File
#include   // Device Guid include File
#include  // Windows IO Control Define include File
#pragma package(smart_init)
#pragma resource "*.dfm"
#define INTERFACE_DETAIL_SIZE    (1024)
#define MAX_DEVICE                16
TForm1 *Form1;    __fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
}    int __fastcall TForm1::GetDevicePath(LPGUID lpGuid, LPTSTR* pszDevicePath)
{
        HDEVINFO hDevInfoSet;
        SP_DEVICE_INTERFACE_DATA ifdata;
        PSP_DEVICE_INTERFACE_DETAIL_DATA pDetail;
        int nCount;
        BOOL bResult;            hDevInfoSet = ::SetupDiGetClassDevs(lpGuid,
                        NULL,
                        NULL,
                        DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);            if(hDevInfoSet == INVALID_HANDLE_VALUE)
        {
                return 0;
        }            pDetail = (PSP_DEVICE_INTERFACE_DETAIL_DATA)::GlobalAlloc(LMEM_ZEROINIT, INTERFACE_DETAIL_SIZE);            pDetail->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);            nCount = 0;
        bResult = TRUE;            while (bResult)
        {
                ifdata.cbSize=sizeof(ifdata);                    bResult = ::SetupDiEnumDeviceInterfaces(
                                hDevInfoSet,
                                NULL,
                                lpGuid,
                                (ULONG)nCount,
                                &ifdata);                    if(bResult)
                {
                        bResult = SetupDiGetInterfaceDeviceDetail(
                                        hDevInfoSet,
                                        &ifdata,
                                        pDetail,
                                        INTERFACE_DETAIL_SIZE,
                                        NULL,
                                        NULL);                            if(bResult)
                        {
                                ::strcpy(pszDevicePath[nCount], pDetail->DevicePath);
                Memo1->Lines->Add(pDetail->DevicePath);
                                nCount++;
                        }
                }
        }            ::GlobalFree(pDetail);            ::SetupDiDestroyDeviceInfoList(hDevInfoSet);            return nCount;
}    void __fastcall TForm1::Button1Click(TObject *Sender)
{            HANDLE hDevice;            String strInfo;
        int nDevice;
        int i,j;
        char* szDevicePath[MAX_DEVICE];
        LPGUID lpGuid[] = {
                (LPGUID)&DiskClassGuid,
                (LPGUID)&CdRomClassGuid,
                (LPGUID)&StoragePortClassGuid,
        (LPGUID)&MediumChangerClassGuid
        };            for(i=0 ; i < MAX_DEVICE ; i++) szDevicePath[i]=new char[256];            for(i=0; i < sizeof(lpGuid) / sizeof(LPGUID) ; i++)
        {
                nDevice=GetDevicePath(lpGuid[i], szDevicePath);
        }            for(i=0 ; i < MAX_DEVICE ; i++) delete []szDevicePath[i];    }        Unit1.h 
   //---------------------------------------------------------------------------
#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include 
#include 
#include 
#include <Forms.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
 {
  __published: // IDE-managed Components        
               TMemo *Memo1;        
               TButton *Button1;        
               void __fastcall Button1Click(TObject *Sender);
 private: // User      declarationspublic:  // User declarations        
               __fastcall TForm1(TComponent* Owner);        
           int __fastcall GetDevicePath(LPGUID lpGuid, LPTSTR* pszDevicePath);
 };
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif    

/*生活是一種藝術,用心生活才能享受生活*/

The GetDriveType function determines whether a disk drive is a removable, fixed, CD-ROM, RAM disk, or network drive.     UINT GetDriveType(        LPCTSTR lpRootPathName         // address of root path 
   );        
     Parameters    lpRootPathName    Points to a null-terminated string that specifies the root directory of the disk to return information about. If lpRootPathName is NULL, the function uses the root of the current directory.          Return Values    The return value specifies the type of drive. It can be one of the following values:     Value        Meaning
0        The drive type cannot be determined.
1        The root directory does not exist.
DRIVE_REMOVABLE        The drive can be removed from the drive.
DRIVE_FIXED        The disk cannot be removed from the drive.
DRIVE_REMOTE        The drive is a remote (network) drive.
DRIVE_CDROM        The drive is a CD-ROM drive.
DRIVE_RAMDISK        The drive is a RAM disk.

引言: 我試了GetDriveType的API可是都寫不出來 可以請大大教我這個API怎麼用嗎 ~我還在學習狀態希望多多向您學習~

Kraen4468您好:    void __fastcall TForm1::Button1Click(TObject *Sender)
{
    AnsiString Drive = "C:\\";
    int type = GetDriveType( Drive.c_str() );        AnsiString DriveType;        if ( type == 0 ){
        DriveType = "The drive type cannot be determined.";
    }
    else if ( type == 1 ){
        DriveType = "The root directory does not exist.";
    }
    else if ( type == 2 ){
        DriveType = "The drive can be removed from the drive";
    }
    else if ( type == 3 ){
        DriveType = "The disk cannot be removed from the drive.";
    }
    else if ( type == 4 ){
        DriveType = "The drive is a remote (network) drive.";
    }
    else if ( type == 5 ){
        DriveType = "The drive is a CD-ROM drive.";
    }
    else if ( type == 6 ){
        DriveType = "The drive is a RAM disk.";
    }        MessageDlg( DriveType, mtInformation, TMsgDlgButtons() << mbOK, 0 );
}

/*生活是一種藝術,用心生活才能享受生活*/

Drive.c_str() 

引言:

Drive.c_str() 

可以問一個小問題嗎後面加.c_str()是什麼意思呢 ~我還在學習狀態希望多多向您學習~

AnsiString 字串處理    在C語言裡，字串處理多用字元陣列來做，使用上不很親切。     在C  Builder中，實作了AnsiString 類別來處理字串，提供更好的選擇。(AnsiString 可以 String表示）      String str;
  str=String("This is a line of text");  // 建構子
  str=String(0);                         // 建構子
  str=String(34.234);                    // 建構子
  
  String stra=String("String a");
  String strb=String("String b");
  String strc;
  strc=stra strb;                       // 字串的串接
  if(stra.AnsiCompare(strb))            // 字串的比較
   {...}
 int index;
  index=strc.AnsiPos("ring");           // 子字串的尋找     MessageBox(strc.c_str(),stra.c_str(),MB_OK); // 轉為字元陣列格式
 index=strc.Length();                 // 字串長度
 
 str=strc.SubString(3,4);             // 擷取子字串
  str=strc.UpperCase();                // 全改為大寫字母
 str=strc.LowerCase();                // 全改為小寫字母
  int x;
  str="20";
  x=str.ToInt();                       // 轉為整數
 float r;
  str="20.334";
  r=str.ToDouble();                   // 轉為浮點數    

/*生活是一種藝術,用心生活才能享受生活*/