窗口拖动功能,以及拖动时卡的解决方案

const int WM_NCLBUTTONDOWN = 0xA1;  

const int HT_CAPTION = 0x2;  

[DllImport("user32.dll")]  

static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);  

  

private void Form2_MouseDown(object sender, MouseEventArgs e)  

{  

    if (e.Button == MouseButtons.Left & this.WindowState == FormWindowState.Normal)  

    {  

        // 移动窗体   

        this.Capture = false;  

        SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);  

    }  

}  

const int WM_NCLBUTTONDOWN = 0xA1;

const int HT_CAPTION = 0x2;

[DllImport("user32.dll")]

static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);



private void Form2_MouseDown(object sender, MouseEventArgs e)

{

    if (e.Button == MouseButtons.Left & this.WindowState == FormWindowState.Normal)

    {

        // 移动窗体

        this.Capture = false;

        SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);

    }

}







 

 

实验证明这个方法是比较好的，它模拟了点击窗口标题栏进行拖动的动作 

我以前用过的方法是设置窗体的Location的方法，很卡，而且快速拖动会不同步

 

Point m_oldpoint;  

bool m_mouse_is_down = false;  

  

private void pictureBox_title_MouseDown(object sender, MouseEventArgs e)  

{  

    m_oldpoint = MousePosition;  

}  

  

private void pictureBox_title_MouseMove(object sender, MouseEventArgs e)  

{  

    if ((e.Button != MouseButtons.Left) || (MousePosition == m_oldpoint))  

    {  

        return;  

    }  

    this.Location = new Point(this.Location.X + MousePosition.X - m_oldpoint.X, this.Location.Y + MousePosition.Y - m_oldpoint.Y);  

    m_oldpoint = MousePosition;  

}  

 

Point m_oldpoint; bool m_mouse_is_down = false; private void pictureBox_title_MouseDown(object sender, MouseEventArgs e) { m_oldpoint = MousePosition; } private void pictureBox_title_MouseMove(object sender, MouseEventArgs e) { if ((e.Button != MouseButtons.Left) || (MousePosition == m_oldpoint)) { return; } this.Location = new Point(this.Location.X + MousePosition.X - m_oldpoint.X, this.Location.Y + MousePosition.Y - m_oldpoint.Y); m_oldpoint = MousePosition; }