C#鼠标任意拖动PictureBox等控件(使用API ReleaseCapture SendMessage)
今天，有个网友询问：C#中，如何随意拖动PictureBox？
看到这个问题，我自然而然就联想到了以前的拖动无边框窗体的实现上，其实，不只是PictureBox，基本上所有的控件都可以被拖动。
实现，就是利用Windows的API函数：SendMessage 和 ReleaseCapture 即可了，代码很简单。
http://www.zu14.cn/wp-content/uploads/2009/04/j95qtc6nuzemuqjuwx.jpghttp://www.zu14.cn/wp-content/uploads/2009/04/6xvmhgdb7en8hju0ij.jpg
核心代码如下:
<div class="wp_codebox">const uint WM_SYSCOMMAND = 0x0112;const uint SC_MOVE = 0xF010;const uint HTCAPTION = 0x0002;[DllImport("user32.dll", EntryPoint="SendMessageA")] private static extern int SendMessage(IntPtr hwnd, uint wMsg, uint wParam, uint lParam); [DllImport("user32.dll")] private static extern int ReleaseCapture(); void PictureBox1MouseDown(object sender, MouseEventArgs e){ ReleaseCapture(); SendMessage((sender as Control).Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);}
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