在调用ShellExecute函数时，设置好第一个参数hwnd和第四个参数lpDirectory，确保正确使用引入的路径。

示例代码如下：

void MyClass::executeProgram()
{
    //获取当前程序的路径，用于设置lpDirectory
    TCHAR szPath[_MAX_PATH];
    ::GetModuleFileName(NULL, szPath, _MAX_PATH);
    TCHAR* lpDirectory = ::PathFindFileName(szPath);
    *(lpDirectory - 1) = TCHAR('\\');

    //设置ShellExecute的参数
    LPCTSTR lpFile = _T("C:\\Windows\\notepad.exe");
    LPCTSTR lpParameters = _T("myfile.txt");
    LPCTSTR lpVerb = _T("open");
    HWND hwnd = NULL;
    int nShowCmd = SW_SHOWNORMAL;

    //调用ShellExecute函数
    HINSTANCE hInst = ShellExecute(hwnd, lpVerb, lpFile, lpParameters, lpDirectory, nShowCmd);

    if((UINT)hInst <= 32)
    {
        //shell execute错误
        DWORD error = ::GetLastError();
        CString message;
        message.Format(_T("Error %d: Unable to launch file %s"), error, lpFile);
        AfxMessageBox(message);
    }
}