一个登录窗体,FormBorderStyle属性设置为None,打开后不能挪动位置,有时候会妨碍使用,有点恶心。网上找了段内容,实现拖动效果:
#region 无边框拖动效果,Form被PictureBox覆盖,Form事件不会被触发
[System.Runtime.InteropServices.DllImport("user32.dll")]//拖动无窗体的控件
public static extern bool ReleaseCapture();
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
[System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
internal static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
public const int WM_SYSCOMMAND = 0x0112;
public const int SC_MOVE = 0xF010;
public const int HTCAPTION = 0x0002;
private void pictureBoxBackground_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
}
}
public const int WM_NCLBUTTONDOWN = 0xA1;
public const int HT_CAPTION = 0x2;
public const int MOUSEWHEEL = 0x020A;
private void pictureBoxBackground_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
}
}
#endregion