vc开机自启动的程序

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

void CopenrunDlg::OnBnClickedButton1()
{
    // TODO: 在此添加控件通知处理程序代码
    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("打开注册表项失败"));
        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("写注册表失败"));
        RegCloseKey(hKey);
    }
    RegCloseKey(hKey);

}