C#中使用SendMessage在进程间传递数据的

包含整个SLN解决方案，绝对调试通过，详见http://blog.csdn.net/yl2isoft/article/details/20222679

using System;
using System.Runtime.InteropServices;

namespace CopyDataStruct
{
    public struct COPYDATASTRUCT
    {
        public IntPtr dwData;
        public int cbData;
        [MarshalAs（UnmanagedType.LPStr）]
        public string lpData;
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       4096  2016-12-28 20:02  SendMessageExample\CopyDataStruct\bin\Debug\CopyDataStruct.dll

     文件       7680  2016-12-28 20:02  SendMessageExample\CopyDataStruct\bin\Debug\CopyDataStruct.pdb

     文件        269  2016-12-28 20:02  SendMessageExample\CopyDataStruct\COPYDATASTRUCT.cs

     文件       2324  2016-12-28 20:02  SendMessageExample\CopyDataStruct\CopyDataStruct.csproj

     文件        432  2016-12-28 20:02  SendMessageExample\CopyDataStruct\obj\Debug\CopyDataStruct.csproj.FileListAbsolute.txt

     文件       4096  2016-12-28 20:02  SendMessageExample\CopyDataStruct\obj\Debug\CopyDataStruct.dll

     文件       7680  2016-12-28 20:02  SendMessageExample\CopyDataStruct\obj\Debug\CopyDataStruct.pdb

     文件       5639  2016-12-28 20:02  SendMessageExample\CopyDataStruct\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件       1384  2016-12-28 20:01  SendMessageExample\CopyDataStruct\Properties\AssemblyInfo.cs

     文件       4096  2016-12-28 20:02  SendMessageExample\Receiver\bin\Debug\CopyDataStruct.dll

     文件       7680  2016-12-28 20:02  SendMessageExample\Receiver\bin\Debug\CopyDataStruct.pdb

     文件       8192  2016-12-28 20:12  SendMessageExample\Receiver\bin\Debug\Receiver.exe

     文件      24064  2016-12-28 20:12  SendMessageExample\Receiver\bin\Debug\Receiver.pdb

     文件      11600  2016-12-28 20:13  SendMessageExample\Receiver\bin\Debug\Receiver.vshost.exe

     文件        490  2010-03-17 22:39  SendMessageExample\Receiver\bin\Debug\Receiver.vshost.exe.manifest

     文件        895  2016-12-28 20:12  SendMessageExample\Receiver\frmReceiver.cs

     文件       1970  2016-12-28 20:12  SendMessageExample\Receiver\frmReceiver.Designer.cs

     文件       5817  2016-12-28 20:12  SendMessageExample\Receiver\frmReceiver.resx

     文件       6329  2016-12-28 20:12  SendMessageExample\Receiver\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件        288  2016-12-28 20:12  SendMessageExample\Receiver\obj\x86\Debug\GenerateResource.read.1.tlog

     文件        854  2016-12-28 20:12  SendMessageExample\Receiver\obj\x86\Debug\GenerateResource.write.1.tlog

     文件        928  2016-12-28 20:13  SendMessageExample\Receiver\obj\x86\Debug\Receiver.csproj.FileListAbsolute.txt

     文件       8192  2016-12-28 20:12  SendMessageExample\Receiver\obj\x86\Debug\Receiver.exe

     文件        180  2016-12-28 20:12  SendMessageExample\Receiver\obj\x86\Debug\Receiver.frmReceiver.resources

     文件      24064  2016-12-28 20:12  SendMessageExample\Receiver\obj\x86\Debug\Receiver.pdb

     文件        180  2016-12-28 20:02  SendMessageExample\Receiver\obj\x86\Debug\Receiver.Properties.Resources.resources

     文件       9502  2016-12-28 20:02  SendMessageExample\Receiver\obj\x86\Debug\ResolveAssemblyReference.cache

     文件        495  2016-12-28 20:12  SendMessageExample\Receiver\Program.cs

     文件       1372  2016-12-28 19:45  SendMessageExample\Receiver\Properties\AssemblyInfo.cs

     文件       2867  2016-12-28 19:45  SendMessageExample\Receiver\Properties\Resources.Designer.cs

............此处省略60个文件信息