C++ Builder help 에 있는 것 입니다.. 가능하시면 Help 를 잘 활용해 보세요.~~~

/*
This example shows how to use the TRegistry class in order to
find, insert and delete Keys and Items into the Windows Registry.
This example uses two buttons: InsertToRegBtn and DeleteFromRegBtn,
for inserting and deleting the values.
*/
void __fastcall TForm2::InsertToRegBtnClick(TObject *Sender)
{
    TRegistry* reg = new TRegistry(KEY_READ);
    reg->RootKey = HKEY_LOCAL_MACHINE;

    if(!reg->KeyExists("Software\\MyCompanyName\\MyApplication\\"))
    {
        MessageDlg("Key not found! Created now.",
                    mtInformation, TMsgDlgButtons() << mbOK, 0);
    }
    reg->Access = KEY_WRITE;
    bool openResult = reg->OpenKey("Software\\MyCompanyName\\MyApplication\\", true);

    if(!openResult)
    {
        MessageDlg("Unable to create key! Exiting.",
                    mtError, TMsgDlgButtons() << mbOK, 0);
        return;
    }
    //checking if the values exist and inserting when neccesary

    if(!reg->KeyExists("Creation\ Date"))
    {
        TDateTime today = TDateTime::CurrentDateTime();
        reg->WriteDateTime("Creation\ Date", today);
    }

    if(!reg->KeyExists("Licenced\ To"))
    {
        reg->WriteString("Licenced\ To", "MySurname\ MyFirstName");
    }

    if(!reg->KeyExists("App\ Location"))
    {
        reg->WriteExpandString("App\ Location",
                                "%PROGRAMFILES%\\MyCompanyName\\MyApplication\\");
    }

    if(!reg->KeyExists("Projects\ Location"))
    {
        reg->WriteExpandString("Projects\ Location",
                                "%USERPROFILE%\\MyApplication\\Projects\\");
    }

    reg->CloseKey();
}
//---------------------------------------------------------------------------
void __fastcall TForm2::DelFromRegBtnClick(TObject *Sender)
{
    //deleting the example registry entries
    TRegistry* reg = new TRegistry(KEY_WRITE);
    reg->RootKey = HKEY_LOCAL_MACHINE;

    reg->DeleteKey("Software\\MyCompanyName\\MyApplication");
    reg->DeleteKey("Software\\MyCompanyName");

    reg->CloseKey();
}
//---------------------------------------------------------------------------


시온스 님이 쓰신 글 :
: 제가 JAVA라는 프로그램이 설치된 폴더를 찾으려고했는데요. 레지스트를 뒤져보니까.
:
: HKEY_LOCAL_MACHINE / SOFTWARE / JavaSoft / Java Runtime Environment
:
: 폴더를 보니까.
:
: CurrnetVersion 값이 1.6이면
: HKEY_LOCAL_MACHINE / SOFTWARE / JavaSoft / Java Runtime Environment / 1.6
:
: 1.7이면
: HKEY_LOCAL_MACHINE / SOFTWARE / JavaSoft / Java Runtime Environment / 1.7
: 
:
: 폴더에서
: JavaHome << 이 값이 JAVA 폴더더라고요.
:
: 
: 그래서 이 값을 구하는 방법을 알고싶은데요. 헤더이름이랑 사용법이나 예제좀 만들거나 찾아주세요.