我正在开发一个 rdp 虚拟通道应用程序。我已经在注册表中注册了客户端 dll 并试图了解，客户端 dll 已加载。但是pVirtualChannelInit从pEntryPoints. 它只是不返回任何结果，调试器转到此函数上的反汇编代码。但是如果不停止此呼叫，VirtualChannelEntry则第二次呼叫（为什么？）。
如果我使用调试器来调试 mstsc.exe。第一次通话后一段时间后，在控制台中我可以看到：
First-chance exception at 0x00000004 in mstsc.exe: 0xC0000005: an access violation in the performance at 0x00000004.//用谷歌翻译在第二次通话后，屏幕上出现了 rdp 会话：
First-chance exception at 0x773EC42D (KernelBase.dll) in mstsc.exe: 0x000006BA: RPC server is unavailable.
First-chance exception at 0x773EC42D (KernelBase.dll) in mstsc.exe: 0x000006BA: RPC server is unavailable.
First-chance exception at 0x773EC42D (KernelBase.dll) in mstsc.exe: 0x000006BA: RPC server is unavailable.
First-chance exception at 0x773EC42D in mstsc.exe: Microsoft C++ exception: unsigned long at memory location 0x06CCF8C0.
First-chance exception at 0x773EC42D in mstsc.exe: Microsoft C++ exception: unsigned long at memory location 0x06CCF8C0.
First-chance exception at 0x773EC42D in mstsc.exe: Microsoft C++ exception: [rethrow] at memory location 0x00000000.
First-chance exception at 0x773EC42D in mstsc.exe: Microsoft C++ exception: [rethrow] at memory location 0x00000000.
First-chance exception at 0x773EC42D in mstsc.exe: Microsoft C++ exception: unsigned long at memory location 0x06CCF8C0.
First-chance exception at 0x773EC42D in mstsc.exe: Microsoft C++ exception: unsigned long at memory location 0x06CCF8C0.
First-chance exception at 0x773EC42D in mstsc.exe: Microsoft C++ exception: [rethrow] at memory location 0x00000000.
First-chance exception at 0x773EC42D in mstsc.exe: Microsoft C++ exception: [rethrow] at memory location 0x00000000.
pEntryPoints 中的指针总是：
pVirtualChannelInit - 0x00000004
pVirtualChannelOpen - 0x0000ffff
pVirtualChannelClose - 0x000000b8
pVirtualChannelWrite - 0x00000000 (Why 0?)
HANDLE ClientHandle = NULL;
CHANNEL_DEF pChannel[1];
CHANNEL_ENTRY_POINTS SavedEntryPoints;
PCHANNEL_INIT_EVENT_FN pChannelInitEventProc;
BOOL VCAPITYPE VirtualChannelEntry(PCHANNEL_ENTRY_POINTS pEntryPoints)
{
ofstream myfile;
myfile.open ("D:\\Projects\\bench_cli\\ConsoleApplication1\\Release\\example.txt");
myfile << "Writing this to a file.\n";
UINT retval1 = 0;
ZeroMemory(&pChannel[0], sizeof(CHANNEL_DEF));
strcpy(pChannel[0].name, "Bench");
pChannel[0].options = CHANNEL_OPTION_ENCRYPT_RDP | CHANNEL_OPTION_COMPRESS_RDP;
pChannelInitEventProc = VirtualChannelInitEvent;
memcpy(&SavedEntryPoints, pEntryPoints, sizeof(CHANNEL_ENTRY_POINTS));
myfile << " copied" << endl;
// call VirtualChannelInit using the function pointer in
// PCHANNEL_ENTRY_POINTS
myfile << "Initing" << endl;
retval1 = pEntryPoints->pVirtualChannelInit (&ClientHandle,
pChannel, 1, VIRTUAL_CHANNEL_VERSION_WIN2000,
pChannelInitEventProc); //here we stuck
myfile << " init" << endl; //this never printed
myfile.close();
return TRUE;
}
VOID VCAPITYPE VirtualChannelInitEvent( LPVOID pInitHandle, UINT event, LPVOID pData, UINT dataLength)
{
...//never called
}