将c＃windows面板转换为c HWND(Convert c# windows panel to c HWND)

 我有一个接受HWND的dll，（dll中的代码）; 
 
void VideoCapture::SetVideoWindow(HWND VidWind)
{
    VideoWindow = VidWind;
}
 
 我在c＃.net应用程序中调用了上面的dll，在c＃.net中添加了dll，我有一个带有Panel的表单，是否可以将该面板传递给dll？ 我在c＃中给出了如下代码 
 
VidCapWrapper.ManagedVideoCapture cc = new VidCapWrapper.ManagedVideoCapture();

cc.SetVideoWindow( panel1);
 
 我得到的错误如下：'错误2'VidCapWrapper.ManagedVideoCapture.SetVideoWindow（HWND__ ）'的最佳重载方法匹配有一些无效的参数D：\ DirectShow_Capture_GUI \ DirectShow_Capture_GUI \ Form1.cs 44 13 DirectShow_Capture_GUI错误3参数1：无法转换从'System.Windows.Forms.Panel'到'HWND__ 'D：\ DirectShow_Capture_GUI \ DirectShow_Capture_GUI \ Form1.cs 44 32 DirectShow_Capture_GUI` 
 
 任何人都可以告诉我如何将面板传递给dll，（任何一个例子都会很好）？ （抱歉，我对.net很新，但尝试创建一个示例应用程序，显示集成网络摄像头等可用设备...然后在c＃.net表单面板上显示预览） 
 
 编辑 ：感谢@Blachshma和@Hans Passant，现在我能够将c＃windows窗体的面板传递给我的c ++ dll。 
 
 我在dll中改变了我的功能 
 
void VideoCapture::SetVideoWindow(IntPtr windowHandle)
{
    VideoWindow = (HWND)windowHandle.ToPointer();
}
 
 在c＃我称之为cc.SetVideoWindow（panel1.Handle）; 

I have a dll which accepts HWND, (code in the dll);
 
void VideoCapture::SetVideoWindow(HWND VidWind)
{
    VideoWindow = VidWind;
}
 
i am calling the above dll in a sample c#.net application by adding the dll in references, in c#.net i have a form with Panel, is it possible to pass that panel to the dll? i gave code as below in c#
 
VidCapWrapper.ManagedVideoCapture cc = new VidCapWrapper.ManagedVideoCapture();

cc.SetVideoWindow( panel1);
 
i am getting errors as below: 'Error 2 The best overloaded method match for 'VidCapWrapper.ManagedVideoCapture.SetVideoWindow(HWND__)' has some invalid arguments D:\DirectShow_Capture_GUI\DirectShow_Capture_GUI\Form1.cs 44 13 DirectShow_Capture_GUI Error 3 Argument 1: cannot convert from 'System.Windows.Forms.Panel' to 'HWND__' D:\DirectShow_Capture_GUI\DirectShow_Capture_GUI\Form1.cs 44 32 DirectShow_Capture_GUI`
 
Can any one please tell me how to pass panel to dll, (any example will be good)? (sorry i am very new to .net, but trying to create a sample app which shows available devices like integrated webcam... and then shows preview on c#.net form panel)
 
EDIT: Thanks to Both @Blachshma and @Hans Passant, Now i am able to pass c# windows form's panel to my c++ dll.
 
I changed my func in dll as 
 
void VideoCapture::SetVideoWindow(IntPtr windowHandle)
{
    VideoWindow = (HWND)windowHandle.ToPointer();
}
 
and in c# i am calling it as cc.SetVideoWindow(panel1.Handle);

原文：https://stackoverflow.com/questions/13821680