[转]C#鼠标拖动任意控件

C#鼠标拖动任意控件(winform)

分类： c#2011-08-15 22:51 178人阅读评论(0) 收藏举报

 1         using System.Runtime.InteropServices;  
 2         //并为控件 添加 MouseDown 事件 
 3 
 4         // C#鼠标拖动任意控件 
 5 
 6         // 利用Windows的API函数：SendMessage 和 ReleaseCapture 
 7         const uint WM_SYSCOMMAND = 0x0112;
 8         const uint SC_MOVE = 0xF010;
 9         const uint HTCAPTION = 0x0002;
10 
11         [DllImport("user32.dll", EntryPoint = "SendMessageA")]
12         private static extern int SendMessage(IntPtr hwnd, uint wMsg, uint wParam, uint lParam);
13         [DllImport("user32.dll")]
14         private static extern int ReleaseCapture();
15 
16         void ControlMouseDown(object sender, MouseEventArgs e)
17         {
18             ReleaseCapture();
19             SendMessage((sender as Control).Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
20         }

来自：https://www.cnblogs.com/yangruiGB2312/p/5823943.html

[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
[DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
public const int WM_SYSCOMMAND = 0x0112;
public const int SC_MOVE = 0xF010;
public const int HTCAPTION = 0x0002;
/// <summary>
/// 为了是主界面能够移动
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
    ReleaseCapture();
    SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
}