我已经成功编写了一个32位Excel RTD server。这在Excel中很好地加载,并在单元格中键入=RTD(...)
。但是,我的相同代码的64位版本不起作用,我想知道任何调试方法。我找不到任何相关文件。
我有一个64位RTD服务器DLL。依赖walker没有显示缺少DLL依赖的任何问题,事实上,如果我链接玩具可执行文件,我可以调用此DLL。
DLL已成功注册到regsvr32。
Excel甚至可以看到它,但将其列为“非活动”。在过去,在开发32位版本时,这通常是由于缺少DLL依赖性(但没有错误消息)。如前所述,我可以链接到DLL,并且依赖性walker不会显示任何问题。
我还可以做些什么来调试此问题?如果它是开源我会查看Excel源代码并尝试做它正在做的事情,但显然这不是一个选项。
相同的代码生成一个32位的DLL,32位Excel运行正常。但是64位Excel似乎无法使用64位DLL。
答案 0 :(得分:0)
问题是DLL的注册表项。要回答我自己的问题(并且在了解了比我想要的更多关于COM的信息之后),最好的方法是编写COM客户端应用程序并尝试以多种方式实例化COM服务器。对于RTD,下面是我使用的示例客户端应用程序。如果有人遇到类似问题,我建议先尝试使用CoCreateInstance
,然后看看是否可以从ProgId获取CLSID,然后使用ProgId创建实例,因为这就是Excel所做的事情。相应地更换UUID,"VCRTDServer.RTDFunctions"
替换ProgId。代码:
/**
Small test program to check that the COM DLL was properly
registered
*/
#include <objbase.h>
#ifndef RTD_ARCH
# define RTD_ARCH 32
#endif
//
//Here we do a #import on the DLL ,you can also do a #import on the .TLB
//The #import directive generates two files in the output folders.
//
#import "bin\\VCRTDServer.dll"
#include <iostream>
#include <stdexcept>
#include <string>
#include <tchar.h>
#include "IRTDServer_h.h"
using namespace std;
#define PROGID _T("VCRTDServer.RTDFunctions")
#define CLSID_STRING _T("{8D2EEA35-CBEB-49b1-8F3E-68C8F50F38D8}")
const CLSID CLSID_RTD = {0x8D2EEA35, 0xCBEB, 0x49B1,
{0x8F, 0x3E, 0x68, 0xC8, 0xF5, 0x0F, 0x38, 0xD8}};
const CLSID IID_RTD_UpdateEvent = {0xa43788c1, 0xd91b, 0x11d3,
0x8f, 0x39, 0x00, 0xc0, 0x4f, 0x36, 0x51, 0xb8};
const CLSID IID_RTD = {0xec0e6191, 0xdb41, 0x11d3,
0x8f, 0xe3, 0x00, 0xc0, 0x4f, 0x36, 0x51, 0xb8};
static string GetLastErrorAsString();
static void run();
int main() {
try {
run();
CoUninitialize();
return 0;
} catch(const exception& ex) {
cerr << "Error: " << ex.what() << endl;
CoUninitialize();
return 1;
}
}
void run() {
cout << "CoInitializing" << endl;
CoInitialize(nullptr);
// if CoCreateInstance doesn't work, nothing else will
// cout << "Checking CoCreateInstance" << endl;
// IRtdServer *obj;
// const auto hr = CoCreateInstance(CLSID_RTD,
// nullptr,
// CLSCTX_INPROC_SERVER,
// IID_RTD_UpdateEvent,
// (void**)&obj);
// if(hr != S_OK)
// throw runtime_error("CoCreateInstance failed: " + GetLastErrorAsString());
cout << "Converting prog id to clsid" << endl;
CLSID clsid;
const auto ptoc_res = CLSIDFromProgID(L"VCRTDServer.RTDFunctions", &clsid);
if(ptoc_res != S_OK)
throw runtime_error("CLSID error: " + GetLastErrorAsString());
cout << "Printing out class ID" << endl;
cout << "Class ID: " << *((int*)&clsid) << endl;
LPOLESTR progId;
const auto progIdResult = ProgIDFromCLSID(
CLSID_RTD, &progId);
if(progIdResult != S_OK)
throw runtime_error("Prog ID error: " + GetLastErrorAsString());
char buf[40];
WideCharToMultiByte(CP_ACP, NULL, progId, -1, buf, 40, NULL, NULL);
cout << "prog id is '" << buf << "'" << endl;
cout << "Creating instance" << endl;
RTDServerLib::IRtdServerPtr rtdServer;
if(rtdServer.CreateInstance(CLSID_RTD) != S_OK)
throw runtime_error("Could not create instance: " +
GetLastErrorAsString());
cout << "Starting RTD server" << endl;
const auto startResult = rtdServer->ServerStart(nullptr);
cout << "Start result was: " << startResult << endl;
}
//Returns the last Win32 error, in string format. Returns an empty string if there is no error.
std::string GetLastErrorAsString() {
//Get the error message, if any.
const auto errorMessageID = ::GetLastError();
if(errorMessageID == 0)
return {}; //No error message has been recorded
LPSTR messageBuffer = nullptr;
size_t size = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, errorMessageID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, nullptr);
std::string message(messageBuffer, size);
//Free the buffer.
LocalFree(messageBuffer);
return message;
}