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// 自定義密碼輸入對話框窗體
public partial class PasswordInputDialog : Form
{
    public string Password { get; private set; }
    public PasswordInputDialog(string prompt, string title)
    {
        InitializeComponent();
        this.labelPrompt.Text = prompt;
        this.Text = title;
    }
    private void btnOK_Click(object sender, EventArgs e)
    {
        Password = textBoxPassword.Text;
        DialogResult = DialogResult.OK;
        Close();
    }
    private void btnCancel_Click(object sender, EventArgs e)
    {
        DialogResult = DialogResult.Cancel;
        Close();
    }
}
// 在主程序窗口中，使用自定義對話框獲取輸入
public static string GetPasswordInput(string prompt, string title)
{
    using (var dialog = new PasswordInputDialog(prompt, title))
    {
        return dialog.ShowDialog() == DialogResult.OK ? dialog.Password : string.Empty;
    }
}
// 調(diào)用示例
string password = GetPasswordInput("請輸入密碼：", "密碼輸入");