vc開機自啟動的程式

#include <Windows.h>
#include <tchar.h>

void CopenrunDlg::OnBnClickedButton1()
{
// TODO: 在此添加控制項通知處理常式代碼
    TCHAR m_fileName[100];
// CString m_fileName;
    GetModuleFileName(NULL,m_fileName,100);
    HKEY hKey;
    CString str = _T("Software\\Microsoft\\Windows\\CurrentVersion\\Run");
if (ERROR_SUCCESS != RegCreateKey(HKEY_LOCAL_MACHINE, str, &hKey))
    {
        MessageBox(_T("開啟登錄機碼失敗"));
        RegCloseKey(hKey);
return;
    }
int length = 0;
while(m_fileName[length]!=_T('\0'))
        length++;
if (ERROR_SUCCESS != RegSetValueEx(hKey, _T("MyAutoRun"), 0, REG_SZ, (const BYTE *)m_fileName, sizeof(TCHAR)*length))
    {
        MessageBox(_T("寫註冊表失敗"));
        RegCloseKey(hKey);
    }
    RegCloseKey(hKey);

}