从C ++调用未注册的.net dll. [英] Calling unregistered .net dll from c++.
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问题描述
你好
如何在C ++中调用在.net Framework 2.0中创建的dll,
尽管dll未进行COM注册.通过注册dll,我可以使用以下代码调用dll.
Hello
How do i call a dll which is created in .net framework 2.0 in C++,
although the dll is not COM registered. With registering the dll i can call the dll with the following code.
#include "stdio.h"
#include "conio.h"
#import "C:\Documents and Settings\Desktop\d\test.dll.tlb"
using namespace test;
#include <string>;
using namespace std;
void main(int argc, char* argv[])
{
HRESULT hr = CoInitialize(NULL);
IPayProcess* pTest = NULL;
hr = CoCreateInstance(__uuidof(Pay), NULL, CLSCTX_INPROC_SERVER, __uuidof(IPayProcess), (void**)&pTest);
pTest->;PayProcess("abc");
}
</string>
如果我不注册该dll,它将给出未设置为实例错误的对象引用.
谢谢
If I don''t register the dll it gives the object reference not set to an instance error.
Thanks
推荐答案
看看免费注册的COM互操作性:
http://msdn.microsoft.com/en-us/library/fh1h056h.aspx [ ^ ]
还有DllImportAttribute类:
http://msdn.microsoft.com/en-us/library/system. runtime.interopservices.dllimportattribute.aspx [ ^ ]
祝您好运!
Have a look Registration-Free COM Interop:
http://msdn.microsoft.com/en-us/library/fh1h056h.aspx[^]
And also the DllImportAttribute Class:
http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.dllimportattribute.aspx[^]
Good luck!
您可以使用CoLoadLibrary()
加载dll并使用以下代码获取对它的引用;只需将dll的路径添加到第一个参数即可.还要将对CLSID_CGeneric
和IID_IGeneric
的引用更改为您自己的GUID引用.
请注意,在尝试使用指针之前,您应该始终检查CoCreateInstance()
中的返回代码.
You can useCoLoadLibrary()
to load the dll and obtain a reference to it with the following code; just add the path to your dll to the first parameter. Also change references toCLSID_CGeneric
andIID_IGeneric
to your own GUID references.
Note that you should always check the return code fromCoCreateInstance()
before trying to use the pointer.
// check the return code
if (hr == REGDB_E_CLASSNOTREG)
{
// try CoLoadLibrary...
HINSTANCE hInstance = CoLoadLibrary([path to your DLL], FALSE);
if (hInstance != NULL)
{
typedef HRESULT (__stdcall *pDllGetClassObject)(REFCLSID rclsid, REFIID riid, PVOID* ppv);
pDllGetClassObject GetClassObject = (pDllGetClassObject)GetProcAddress(hInstance, "DllGetClassObject");
if (GetClassObject != NULL)
{
IClassFactory* pIFactory;
hr = GetClassObject(CLSID_CGeneric, IID_IClassFactory, (PVOID*)&pIFactory);
if (SUCCEEDED(hr))
{
hr = pIFactory->CreateInstance(NULL, IID_IGeneric, (PVOID*)&pGeneric);
pIFactory->Release();
}
}
}
}
if (SUCCEEDED(hr))
{
// use the COM object as required
}
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