Winform經典表單移動API和表單陰影API

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//表單移動API
[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
[DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int IParam);
public const int WM_SYSCOMMAND = 0x0112;
public const int SC_MOVE = 0xF010;
public const int HTCAPTION = 0x0002;
[DllImport("user32")]
private static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, IntPtr lParam);
private const int WM_SETREDRAW = 0xB;

 

private void Form1_MouseDown(object sender, MouseEventArgs e)
{
if (this.WindowState == FormWindowState.Normal)
{
ReleaseCapture();
SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
}
}

//表單陰影API

1、添加命名空間：using System.Runtime.InteropServices;  2、定義常量值及函數：private const int CS_DropSHADOW = 0x20000;  private const int GCL_STYLE = (-26);  [DllImport("user32.dll", CharSet = CharSet.Auto)]  public static extern int SetClassLong(IntPtr hwnd, int nIndex, int dwNewLong);  [DllImport("user32.dll", CharSet = CharSet.Auto)]  public static extern int GetClassLong(IntPtr hwnd, int nIndex);3、構造方法下引用：SetClassLong(this.Handle, GCL_STYLE, GetClassLong(this.Handle, GCL_STYLE) | CS_DropSHADOW);  

Winform經典表單移動API和表單陰影API