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。

核心代码如下:

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);
}

转载于:https://www.cnblogs.com/zhcw/archive/2011/12/11/2284030.html