C# 在桌面背景播放视频,鼠标可以穿透播放器

Question

请问C# 在桌面背景播放视频,鼠标可以穿透播放器怎么实现呀.就是我在全屏播放视频的时候，视频是透明的，在桌面背景播放，不影响我鼠标点击桌面的图标等.桌面的图标不会被全屏的播放器界面所遮挡.
我要的不是哪个软件有这个功能.我是问用C#语言怎么做出这个功能出来呀.

Answer 1

如果播放器是全屏的话，你可以截获播放视频的那个控件的鼠标消息，并把消息发送给桌面，这样就可以实现透过半透明的窗体操作桌面的效果，给你举个例子

这个例子是截获窗体的鼠标消息，你可以换成相应的控件
窗体无边框，大小位置为桌面工作区(不包括任务栏)的大小位置,窗体半透明

using System.Runtime.InteropServices;

[DllImport("user32.dll", EntryPoint = "PostMessage")]
public static extern int PostMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", EntryPoint = "GetWindow")]
public static extern IntPtr GetWindow(IntPtr hwnd, int wCmd);
[DllImport("user32.dll", EntryPoint = "FindWindow")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
const int WM_MOUSEMOVE = 0x0200;
const int WM_MOUSELEAVE = 0x02A3;
const int WM_SETCURSOR = 0x0020;
const int WM_LBUTTONDOWN = 0x0201;
const int WM_LBUTTONUP = 0x0202;
const int WM_LBUTTONDBLCLK = 0x0203;
const int WM_RBUTTONDOWN = 0x0204;
const int WM_RBUTTONUP = 0x0205;
const int WM_RBUTTONDBLCLK = 0x0206;
const int GW_CHILD = 5;
IntPtr workingAreaHandle;

//获得桌面工作区的句柄
IntPtr GetDesktopListViewHandle()
{
IntPtr hResult;
hResult = FindWindow("ProgMan", null);
hResult = GetWindow(hResult, GW_CHILD);
hResult = GetWindow(hResult, GW_CHILD);
return hResult;
}

private void Form1_Load(object sender, EventArgs e)
{
workingAreaHandle = GetDesktopListViewHandle();
this.FormBorderStyle = FormBorderStyle.None;
this.Location = new Point(0, 0);
this.Size = new Size(Screen.PrimaryScreen.WorkingArea.Width,Screen.PrimaryScreen.WorkingArea.Height);
this.Opacity = 0.5f;
}

protected override void WndProc(ref Message m)
{
if (m.Msg == WM_MOUSEMOVE ||
m.Msg == WM_MOUSELEAVE ||
m.Msg == WM_SETCURSOR ||
m.Msg == WM_LBUTTONDOWN ||
m.Msg == WM_LBUTTONUP ||
m.Msg == WM_LBUTTONDBLCLK ||
m.Msg == WM_RBUTTONDOWN ||
m.Msg == WM_RBUTTONUP ||
m.Msg == WM_RBUTTONDBLCLK)
{
PostMessage(workingAreaHandle, m.Msg, m.WParam, m.LParam);
return;
}
base.WndProc(ref m);
}

Answer 2

TMplayer

Answer 3

现在有一款软件可以播放视频作为桌面，电脑卖场就有，你去搜索看看