如何实现鼠标按下和单击按钮的事件?

使用Windows应用程序
我正在制作将在触摸屏上使用的表格
我想同时使用两个事件(单击和鼠标按下)作为按钮

不能正常工作的代码就是这样:

Using windows application
I''m working on form which will be used on touch screen
I want to use both events (click and mouse down) for button

the code that doesn''t work simply like that :

private void button1_MouseDown(object sender, MouseEventArgs e)
{
    DoDragDrop(this, DragDropEffects.All);
}

private void panel1_DragEnter(object sender, DragEventArgs e)
{
    e.Effect = DragDropEffects.All;
}

private void panel1_DragDrop(object sender, DragEventArgs e)
{
    MessageBox.Show("Drag and Drop Comleted");
}
// this event never never fired
private void button1_Click(object sender, EventArgs e)
{
    MessageBox.Show("Mouse Click Event Fired ");
}

我还尝试了另一种方式的代码，如下所示:

I tried also the code in another ways as follows :

public Form1()
{
    InitializeComponent();
    button1.MouseDown += new MouseEventHandler(button1_MouseDown);
    panel1.DragEnter += new DragEventHandler(panel1_DragEnter);
    panel1.DragDrop += new DragEventHandler(panel1_DragDrop);
    button1.Click += new EventHandler(button1_Click);
}

void button1_Click(object sender, EventArgs e)
{
    MessageBox.Show("Mouse Click Event Fired ");
}

void panel1_DragDrop(object sender, DragEventArgs e)
{
    MessageBox.Show("Drag and Drop Comleted");
}

void panel1_DragEnter(object sender, DragEventArgs e)
{
    e.Effect = DragDropEffects.All;
}

void button1_MouseDown(object sender, MouseEventArgs e)
{
    DoDragDrop(this, DragDropEffects.All);
}

而且这种方式也不起作用

and this way also doesn''t work

public Form1()
     {
         InitializeComponent();
         button1.MouseDown += new MouseEventHandler(button1_MouseDown);
         panel1.DragEnter += new DragEventHandler(panel1_DragEnter);
         panel1.DragDrop += new DragEventHandler(panel1_DragDrop);
         button1.Click += new EventHandler(button1_Click);
     }

     void button1_Click(object sender, EventArgs e)
     {
         MessageBox.Show("Mouse Click Event Fired ");
     }

     void panel1_DragDrop(object sender, DragEventArgs e)
     {
         MessageBox.Show("Drag and Drop Comleted");
     }

     void panel1_DragEnter(object sender, DragEventArgs e)
     {
         e.Effect = DragDropEffects.All;
     }

     void button1_MouseDown(object sender, MouseEventArgs e)
     {
         DoDragDrop(this, DragDropEffects.All);
     }