半透明异形窗体如何镶嵌到主窗体里面

[cyclss]

按下button显示半透明异形窗体与红框，但是当我把其他窗口（QQ，文件夹等待）弹出时，主窗体form1被隐藏到后面，异形窗体却依然置顶，如图
于是，我把异形窗体放panel1，结果报错
[我再换了个方法，常用mid子窗体，结果还是报同样的错，请教怎么回事

 public partial class Form1 : Form
    {
        AlphaForm putForm;
        bool sign = true;


        public Form1()
        {
            InitializeComponent();

        }

        private void Form1_Move(object sender, EventArgs e)
        {
            putForm.Location = new Point(this.Location.X + 100, this.Location.Y + 100);
        }

        private void button1_Click_1(object sender, EventArgs e)
        {
            if (sign == true)
            {
                Bitmap bmp = new Bitmap(200, 200);
                Graphics g = Graphics.FromImage(bmp);
                Pen p = new Pen(Color.Red, 2);
                g.DrawRectangle(p, 0, 0, 50, 50);

                putForm = new AlphaForm(); //alpha通道的显示图像窗体               
                putForm.TopLevel = false;
                // 将窗体放入panel1
                panel1.Controls.Add(putForm);
                putForm.Location = new Point(this.Location.X + 100, this.Location.Y + 100);//框显示在Form1  100x100的位置
                putForm.SetBitmap(bmp, 255); //设置图像 
                putForm.Show(); //显示窗体
                sign = false;
            }
        }

  public partial class AlphaForm : Form
    {
        class Alpha_Win32
        {
            public enum Bool
            {
                False = 0,
                True
            };

            [StructLayout(LayoutKind.Sequential)]
            public struct Point
            {
                public Int32 x;
                public Int32 y;

                public Point(Int32 x, Int32 y) { this.x = x; this.y = y; }
            }

            [StructLayout(LayoutKind.Sequential)]
            public struct Size
            {
                public Int32 cx;
                public Int32 cy;

                public Size(Int32 cx, Int32 cy) { this.cx = cx; this.cy = cy; }
            }

            [StructLayout(LayoutKind.Sequential, Pack = 1)]
            struct ARGB
            {
                public byte Blue;
                public byte Green;
                public byte Red;
                public byte Alpha;
            }

            [StructLayout(LayoutKind.Sequential, Pack = 1)]
            public struct BLENDFUNCTION
            {
                public byte BlendOp;
                public byte BlendFlags;
                public byte SourceConstantAlpha;
                public byte AlphaFormat;
            }

            public const Int32 ULW_COLORKEY = 0x00000001;
            public const Int32 ULW_ALPHA = 0x00000002;
            public const Int32 ULW_OPAQUE = 0x00000004;

            public const byte AC_SRC_OVER = 0x00;
            public const byte AC_SRC_ALPHA = 0x01;


            [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
            public static extern Bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref Point pptDst, ref Size psize, IntPtr hdcSrc, ref Point pprSrc, Int32 crKey, ref BLENDFUNCTION pblend, Int32 dwFlags);

            [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
            public static extern IntPtr GetDC(IntPtr hWnd);

            [DllImport("user32.dll", ExactSpelling = true)]
            public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);

            [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
            public static extern IntPtr CreateCompatibleDC(IntPtr hDC);

            [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
            public static extern Bool DeleteDC(IntPtr hdc);

            [DllImport("gdi32.dll", ExactSpelling = true)]
            public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);

            [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
            public static extern Bool DeleteObject(IntPtr hObject);
        }
        public AlphaForm()
        {
            FormBorderStyle = FormBorderStyle.None;
            DoubleBuffered = true;
            TopMost = true;
            ShowInTaskbar = false;
        }

         public void SetBitmap(Bitmap bitmap)
    {
        SetBitmap(bitmap, 255);
    }
 
    public void SetBitmap(Bitmap bitmap, byte opacity)
    {
        /*
        if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
            throw new ApplicationException("The bitmap must be 32ppp with alpha-channel."+ bitmap.PixelFormat);
        */
        IntPtr screenDc = Alpha_Win32.GetDC(IntPtr.Zero);
        IntPtr memDc = Alpha_Win32.CreateCompatibleDC(screenDc);
        IntPtr hBitmap = IntPtr.Zero;
        IntPtr oldBitmap = IntPtr.Zero;
 
        try
        {
            hBitmap = bitmap.GetHbitmap(Color.FromArgb(0));
            oldBitmap = Alpha_Win32.SelectObject(memDc, hBitmap);
 
            Alpha_Win32.Size size = new Alpha_Win32.Size(bitmap.Width, bitmap.Height);
            Alpha_Win32.Point pointSource = new Alpha_Win32.Point(0, 0);
            Alpha_Win32.Point topPos = new Alpha_Win32.Point(Left, Top);
            Alpha_Win32.BLENDFUNCTION blend = new Alpha_Win32.BLENDFUNCTION();
            blend.BlendOp = Alpha_Win32.AC_SRC_OVER;
            blend.BlendFlags = 0;
            blend.SourceConstantAlpha = opacity;
            blend.AlphaFormat = Alpha_Win32.AC_SRC_ALPHA;
 
            Alpha_Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0, ref blend, Alpha_Win32.ULW_ALPHA);
            GC.Collect();
        }
        finally
        {
            Alpha_Win32.ReleaseDC(IntPtr.Zero, screenDc);
            if (hBitmap != IntPtr.Zero)
            {
                Alpha_Win32.SelectObject(memDc, oldBitmap);
                Alpha_Win32.DeleteObject(hBitmap);
            }
            Alpha_Win32.DeleteDC(memDc);
        }
    }
 
    protected override CreateParams CreateParams
    {
        get
        {
            CreateParams cp = base.CreateParams;
            cp.ExStyle |= 0x00080000; 
            return cp;
        }
    }

[xuzuning]

你都知道是 半透明异形窗体 了 为了表现半透明效果，所以这个窗体就必须放在主窗体的前面而不是里面，不然就挡不住主窗体 有人说 wpf 可以轻松实现，但也许是太轻松了，我从未看到过这个实现的 demo 使用操作系统底层功能，应该可以将窗体和遮罩的像素进行混合处理，从而达到半透的效果。只是我的功力太浅，目前还无法做到，况且太偏底层的话，兼容也是个问题 其实通过异形控件就可实现，不过就没有了半透明的效果了

[以专业开发人员为伍]

控件嵌套控件，你应该开发“用户控件”然后把它组合到其它用户控件或者窗体里边。 你要设计开发用户控件，而不是窗体！！

[以专业开发人员为伍]

随便打开 http://alamiye010.cnblogs.com/ 这类博客你看看例子，Silverlight 和 WPF 本来就是用来开发这类交互界面程序的，随便一个道具、精灵都是“透明”的，都是许多控件层叠的。 一般的 Winform 程序员不太懂这类交互程序界面控件开发，因为工具太 low。你看看这类博客里边的代码，或者 WPF 开发交互游戏的专著就能明白，WPF 是搞图形界面开发的最基本的工具，而 Winform 重点也就是做点“增删改查”数据库表而已。

[xiaoyu5425]

formborderstyle改一下（win开头还是size忘了），不涉及到ActiveX控件还是可以达到你的效果的

[E次奥]

这难道不是让半透明窗体始终Z轴置顶吗？

[cyclss]

引用 2 楼 sp1234 的回复:

控件嵌套控件，你应该开发“用户控件”然后把它组合到其它用户控件或者窗体里边。 你要设计开发用户控件，而不是窗体！！

你好，我试过在pictruebox1上再放一个半透明picturebox2，picturebox1放图片是有半透明效果，但换成视频就不行了

[xuzuning]

换成视频 当然就不行，因为绘制图片和绘制视频的设备不同，混合不到一起去 对于 winform，你只能放弃半透明 wpf 是否可以，我不知道，因为没看到过 demo