c++-cli

From a c# program I want to use WM_COPYDATA with SendMessage to communicate with a legacy c++/cli MFC application. I want to pass a managed struct containing string objects. I can find the handle to the c++ application for use with SendMessage fine. The bit I don't know about is how the struct and it's strings can be marshalled and read at the other end. Especially as it contains non-blittables. Do people think this is feasible? I'll continue to work on it, but would apprecite someone who's done this sort of thing telling me if it just isn't going to work. Here is some demo code if it was a c+

I'm using the OpenCV library and one of its header files, cxoperations.hpp, generates "warning C4793: 'anonymous namespace'::CV_XADD' : function compiled as native" , if my C++ project is compiled with CLR support. I can prevent the warning by surrounding the OpenCV header include like this: #pragma managed(push,off) #include <cv.h> #pragma managed(pop) But the project that actually uses OpenCV isn't compiled with CLR support, it's a native C++ static library. The project that does have CLR support, and generates this warning without the pragma statements, simply uses this static library. So I

How can I convert a 'System::String ^' to 'const char *' in vc++? My code: String ^Result1= "C:/Users/Dev/Desktop/imag.jpg"; IplImage *img1 = cvLoadImage(Result1, 1); if I do like above it will generate following error. error C2664: 'cvLoadImage' : cannot convert parameter 1 from 'System::String ^' to 'const char *' Please help me. It's like this: How to convert from System::String* to Char* in Visual C++ System::String ^ str = "Hello world\n"; //method 1 pin_ptr<const wchar_t> str1 = PtrToStringChars(str); wprintf(str1); //method 2 char* str2 = (char*)Marshal::StringToHGlobalAnsi(str)

I have some C++/CLI code which derives from the .NET System Namespace classes. Is there a way to reuse this code for Universal Windows Platform Apps? I can't get a reference to the System Namespace in C++, though in C# it is possible. It looks like there is only support for C++/Cx code and not for managed C++/CLI. The syntax and keywords of the C++/CX extension resembles C++/CLI a great deal. But that's where similarity ends, they have nothing whatsoever in common. C++/CX gets compiled directly to native code, just like native C++. But C++/CLI is compiled to MSIL, the intermediate language of

Is there a C++/CLI RAII smart pointer class for containment of a native pointer in a managed type? Just wondering, before I go write my own clr_scoped_ptr value class template. I'm aware of the Microsoft-provided: containment of a managed handle in a native class: auto_gcroot containment of a managed handle in a managed class: auto_handle The above two are similar to auto_ptr or unique_ptr . I gave skeleton code for a counted_handle here, similar to shared_ptr But all these are for disposing managed ref class instances, not for freeing native objects. Ben Voigt This one looks fairly complete,

I have been reading this article to understand the gcroot template. I understand the gcroot provides handles into the garbage collected heap and that the handles themselves are not garbage collected. What I don't understand is the following: When the CLR object moves with the garbage-collected heap, the handle will return the new address of the object. A variable does not have to be pinned before it is assigned to a gcroot template. Does that mean that the CLR object will be deleted by the garbage collector even if there is a gcroot handle referencing that object? What is the "new address"