winform窗体边框最小化旁边添加自定义按钮
如图:
想要实现和右面三个按钮一样的效果，应该怎么弄？
代码如下:
[DllImport("user32.dll")]
private static extern IntPtr GetWindowDC(IntPtr hWnd);
[DllImport("user32.dll")]
private static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
private const int WM_NCPAINT = 0x0085;
private const int WM_NCACTIVATE = 0x0086;
private const int WM_NCLBUTTONDOWN = 0x00A1;
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
Rectangle vRectangle = new Rectangle((Width + 105) / 2, 6, 23, 20);
switch (m.Msg)
{
case WM_NCPAINT:
case WM_NCACTIVATE:
IntPtr vHandle = GetWindowDC(m.HWnd);
Graphics vGraphics = Graphics.FromHdc(vHandle);
vGraphics.FillRectangle(new LinearGradientBrush(vRectangle,
Color.Pink, Color.Purple, LinearGradientMode.BackwardDiagonal),
vRectangle);
StringFormat vStringFormat = new StringFormat();
vStringFormat.Alignment = StringAlignment.Center;
vStringFormat.LineAlignment = StringAlignment.Center;
vGraphics.DrawString("…", Font, Brushes.BlanchedAlmond,
vRectangle, vStringFormat);
vGraphics.Dispose();
ReleaseDC(m.HWnd, vHandle);
break;
case WM_NCLBUTTONDOWN:
Point vPoint = new Point((int)m.LParam);
vPoint.Offset(-Left, -Top);
if (vRectangle.Contains(vPoint))
MessageBox.Show(vPoint.ToString());
break;
}
}
