本例子中制作一个无边框的MessageBox窗体
展示效果：
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窗体设计
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添加一个窗体继承原生Form
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public partial class MessageBoxEX : Form
2.属性添加
private string _titleText = "提示";public string TitleText{get { return _titleText; }set { _titleText = value; }}private string _contentText = "暂无信息!";public string ContentText{get { return _contentText; }set { _contentText = value; }}
3.事件添加
/// <summary>/// 窗体load的时候讲文本赋值给消息框/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void MessageBoxEX_Load(object sender, EventArgs e){if (this._contentText.Trim() != ""){this.lblTitalContent.Text = this._titleText;this.lblMessage.Text = this._contentText;}}/// <summary>/// 鼠标按下标题栏移动窗体/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void lblTitleBar_MouseDown(object sender, MouseEventArgs e){//为当前的应用程序释放鼠标捕获ReleaseCapture();//发送消息﹐让系統误以为在标题栏上按下鼠标SendMessage((int)this.Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);}/// <summary>/// 关闭按钮/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnClose_Click(object sender, EventArgs e){this.DialogResult = System.Windows.Forms.DialogResult.Cancel;}/// <summary>/// 确定按钮事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnOK_Click(object sender, EventArgs e){this.DialogResult = System.Windows.Forms.DialogResult.OK;}/// <summary>/// 取消按钮/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnCancel_Click(object sender, EventArgs e){this.DialogResult = System.Windows.Forms.DialogResult.Cancel;}
4.对外公共方法show设计 这里只填写俩个（有需要可以自行修改）
public static DialogResult Show(string text){MessageBoxEX msgbox = new MessageBoxEX(text);return msgbox.ShowDialog();}public static DialogResult Show(string title,string text){MessageBoxEX msgbox = new MessageBoxEX(title,text);return msgbox.ShowDialog();}
5.添加单击窗体标题栏移动窗体
[DllImport("user32.dll", EntryPoint = "SendMessageA")]private static extern int SendMessage(int hwnd, int wMsg, int wParam, int lParam);[DllImport("user32.dll")]private static extern int ReleaseCapture();private const int WM_NCLBUTTONDOWN = 0XA1; //.定义鼠標左鍵按下private const int HTCAPTION = 2;
private void lblTitleBar_MouseDown(object sender, MouseEventArgs e){//为当前的应用程序释放鼠标捕获ReleaseCapture();//发送消息﹐让系統误以为在标题栏上按下鼠标SendMessage((int)this.Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);}
