本文整理汇总了C#中System.Runtime.InteropServices.GCHandle.FromIntPtr方法的典型用法代码示例。如果您正苦于以下问题：C# GCHandle.FromIntPtr方法的具体用法？C# GCHandle.FromIntPtr怎么用？C# GCHandle.FromIntPtr使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Runtime.InteropServices.GCHandle的用法示例。
在下文中一共展示了GCHandle.FromIntPtr方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: CallBack
//引入命名空间
using System;
using System.IO;
using System.Threading;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Security.Permissions;
public delegate bool CallBack(int handle, IntPtr param);
internal static class NativeMethods
{
// passing managed object as LPARAM
// BOOL EnumWindows(WNDENUMPROC lpEnumFunc, LPARAM lParam);
[DllImport("user32.dll")]
internal static extern bool EnumWindows(CallBack cb, IntPtr param);
}
public class App
{
public static void Main()
{
Run();
}
[SecurityPermission(SecurityAction.Demand, UnmanagedCode = true)]
public static void Run()
{
TextWriter tw = Console.Out;
GCHandle gch = GCHandle.Alloc(tw);
CallBack cewp = new CallBack(CaptureEnumWindowsProc);
// platform invoke will prevent delegate to be garbage collected
// before call ends
NativeMethods.EnumWindows(cewp, GCHandle.ToIntPtr(gch));
gch.Free();
}
private static bool CaptureEnumWindowsProc(int handle, IntPtr param)
{
GCHandle gch = GCHandle.FromIntPtr(param);
TextWriter tw = (TextWriter)gch.Target;
tw.WriteLine(handle);
return true;
}
}