從 C# 中的圖片框中移動窗口窗體

Question

我有一個沒有任何邊框的窗體。 所以我添加了一個圖片框，我希望在單擊該圖片框時移動整個表單。

    public const int WM_NCLBUTTONDOWN = 0xA1;
    public const int HT_CAPTION = 0x2;

    [DllImportAttribute("user32.dll")]
    public static extern int SendMessage(IntPtr hWnd,
    int Msg, int wParam, int lParam);
    [DllImportAttribute("user32.dll")]
    public static extern bool ReleaseCapture();

    private void header_image_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            ReleaseCapture();
            SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
        } 
    }

那是我使用 atm 的代碼。但我的問題是，如果我快速移動光標，它不會粘在圖片框上。

我試圖找到解決方案，但沒有任何結果。 我使用了這兩個鏈接中的一些信息：

鏈接 1

鏈接 2

有任何想法嗎？

編輯：這是我的表單的完整代碼

    public Form1()
    {
        InitializeComponent();
    }

    public const int WM_NCLBUTTONDOWN = 0xA1;
    public const int HT_CAPTION = 0x2;

    [DllImportAttribute("user32.dll")]
    public static extern int SendMessage(IntPtr hWnd,
    int Msg, int wParam, int lParam);
    [DllImportAttribute("user32.dll")]
    public static extern bool ReleaseCapture();

    private void header_image_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            ReleaseCapture();
            SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
        } 
    }

Answer 1

參考這個代碼：

 private bool draging = false; private Point pointClicked; private void pictureBox1_MouseMove(object sender, MouseEventArgs e) { if (draging) { Point pointMoveTo; pointMoveTo = this.PointToScreen(new Point(eX, eY)); pointMoveTo.Offset(-pointClicked.X, -pointClicked.Y); this.Location = pointMoveTo; } } private void pictureBox1_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { draging = true; pointClicked = new Point(eX, eY); } else { draging = false; } } private void pictureBox1_MouseUp(object sender, MouseEventArgs e) { draging = false; }

Answer 2

使用MouseMove()事件而不是MouseDown() ：

    private void header_image_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            ReleaseCapture();
            SendMessage(this.Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
        }
    }