using System.Runtime.InteropServices;//引用,放在哪不用說了吧.... [DllImport("dwmapi.dll")] public static extern int DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarinset); [StructLayout(LayoutKind.Sequential)] public struct MARGINS { public int Right; public int left; public int Top; public int Bottom; } private void Form1_Load(object sender, EventArgs e) { this.BackgroundImage = null; MARGINS margins = new MARGINS(); margins.left = -1; margins.Right = -1; margins.Top = -1; margins.Bottom = -1; IntPtr hwnd = Handle; int result = DwmExtendFrameIntoClientArea(hwnd, ref margins); this.BackColor = Color.Black; this.label1.Text = "。。。"; this.label1.BackColor = Color.Transparent; this.label1.ForeColor = Color.White; } using System.Runtime.InteropServices;//引用,放在哪不用說了吧.... [DllImport("dwmapi.dll")] public static extern int DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarinset); [StructLayout(LayoutKind.Sequential)] public struct MARGINS { public int Right; public int left; public int Top; public int Bottom; } private void Form1_Load(object sender, EventArgs e) { this.BackgroundImage = null; MARGINS margins = new MARGINS(); margins.left = -1; margins.Right = -1; margins.Top = -1; margins.Bottom = -1; IntPtr hwnd = Handle; int result = DwmExtendFrameIntoClientArea(hwnd, ref margins); this.BackColor = Color.Black; this.label1.Text = "。。。"; this.label1.BackColor = Color.Transparent; this.label1.ForeColor = Color.White; }