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  • Calling C++ function from C.

    - by claws
    I know this. Calling C function from C++: If my application was in C++ and I had to call functions from a library written in C. Then I would have used //main.cpp extern "C" void C_library_function(int x, int y);//prototype C_library_function(2,4);// directly using it. This wouldn't mangle the name C_library_function and linker would find the same name in its input *.lib files and problem is solved. Calling C++ function from C??? But here I'm extending a large application which is written in C and I need to use a library which is written in C++. Name mangling of C++ is causing trouble here. Well I cannot use C++ compiler over my C project because thats breaking lot of other stuff. What is the way out? By the way I'm using MSVC

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  • Loading Printer Name

    - by Sopolin
    Hi all, I want to write code in C# for loading printer name in window. But I don't have any ideas to write it. Can anybody help me to solve this problem? Thanks. Ung Sopolin

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  • VS2010: New and improved Intellisense?

    - by George
    In VB.NET type this on a new line: DateAdd( Shouldn't a dropdown picklist of enum values appear? It used to! I miss it! Of course, this is just one example where an enum pick list does not appear where it did before. Can anyone defend this or is it a bug?

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  • How to copy bytes from buffer into the managed struct?

    - by Chupo_cro
    I have a problem with getting the code to work in a managed environment (VS2008 C++/CLI Win Forms App). The problem is I cannot declare the unmanaged struct (is that even possible?) inside the managed code, so I've declared a managed struct but now I have a problem how to copy bytes from buffer into that struct. Here is the pure C++ code that obviously works as expected: typedef struct GPS_point { float point_unknown_1; float latitude; float longitude; float altitude; // x10000 float time; int point_unknown_2; int speed; // x100 int manually_logged_point; // flag (1 --> point logged manually) } track_point; int offset = 0; int filesize = 256; // simulates filesize int point_num = 10; // simulates number of records int main () { char *buffer_dyn = new char[filesize]; // allocate RAM // here, the file would have been read into the buffer buffer_dyn[0xa8] = 0x1e; // simulates the speed data (1e 00 00 00) buffer_dyn[0xa9] = 0x00; buffer_dyn[0xaa] = 0x00; buffer_dyn[0xab] = 0x00; offset = 0x90; // if the data with this offset is transfered trom buffer // to struct, int speed is alligned with the buffer at the // offset of 0xa8 track_point *points = new track_point[point_num]; points[0].speed = 0xff; // (debug) it should change into 0x1e memcpy(&points[0],buffer_dyn+offset,32); cout << "offset: " << offset << "\r\n"; //cout << "speed: " << points[0].speed << "\r\n"; printf ("speed : 0x%x\r\n",points[0].speed); printf("byte at offset 0xa8: 0x%x\r\n",(unsigned char)buffer_dyn[0xa8]); // should be 0x1e delete[] buffer_dyn; // release RAM delete[] points; /* What I need is to rewrite the lines 29 and 31 to work in the managed code (VS2008 Win Forms C++/CLI) What should I have after: array<track_point^>^ points = gcnew array<track_point^>(point_num); so I can copy 32 bytes from buffer_dyn to the managed struct declared as typedef ref struct GPS_point { float point_unknown_1; float latitude; float longitude; float altitude; // x10000 float time; int point_unknown_2; int speed; // x100 int manually_logged_point; // flag (1 --> point logged manually) } track_point; */ return 0; } Here is the paste to codepad.org so it can be seen the code is OK. What I need is to rewrite these two lines: track_point *points = new track_point[point_num]; memcpy(&points[0],buffer_dyn+offset,32); to something that will work in a managed application. I wrote: array<track_point^>^ points = gcnew array<track_point^>(point_num); and now trying to reproduce the described copying of the data from buffer over the struct, but haven't any idea how it should be done. Alternatively, if there is a way to use an unmanaged struct in the same way shown in my code, then I would like to avoid working with managed struct.

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  • How to change the default "double click" action of a web service in a class library (VS2010)?

    - by JL
    I have a web service defined as follows, residing in a class library: [WebService(Namespace = "http://comp.com/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. // [System.Web.Script.Services.ScriptService] public class SendingItems_new : System.Web.Services.WebService When I double click it, instead of going to code view, it shows the design view. I NEVER use design view, so how can I get it to open up code view instead, its very annoying having to flick from design view each time. Thank you

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  • How can I create an array of random numbers in C++

    - by Nick
    Instead of The ELEMENTS being 25 is there a way to randomly generate a large array of elements....10000, 100000, or even 1000000 elements and then use my insertion sort algorithms. I am trying to have a large array of elements and use insertion sort to put them in order and then also in reverse order. Next I used clock() in the time.h file to figure out the run time of each algorithm. I am trying to test with a large amount of numbers. #define ELEMENTS 25 void insertion_sort(int x[],int length); void insertion_sort_reverse(int x[],int length); int main() { clock_t tStart = clock(); int B[ELEMENTS]={4,2,5,6,1,3,17,14,67,45,32,66,88, 78,69,92,93,21,25,23,71,61,59,60,30}; int x; cout<<"Not Sorted: "<<endl; for(x=0;x<ELEMENTS;x++) cout<<B[x]<<endl; insertion_sort(B,ELEMENTS); cout <<"Sorted Normal: "<<endl; for(x=0;x<ELEMENTS;x++) cout<< B[x] <<endl; insertion_sort_reverse(B,ELEMENTS); cout <<"Sorted Reverse: "<<endl; for(x=0;x<ELEMENTS;x++) cout<< B[x] <<endl; double seconds = clock() / double(CLK_TCK); cout << "This program has been running for " << seconds << " seconds." << endl; system("pause"); return 0; }

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  • Windows Mobile 6 and twitter

    - by dogsblx
    hi, I'm trying to implement Twitter into a mobile game that I'm developing and having difficulty with using the available libraries. Could someone explain how I use a library such as nTwitter on the .net compact framework 3.5 and windows mobile 6 professional SDK Thanks in advance for any help Tom

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  • How to trigger notification code TBN_TOOLBARCHANGE from inside c++ program?

    - by karikari
    Hi. How to trigger TBN_TOOLBARCHANGE from inside my c++ code? Is it the same as writing like this line below? SendMessage(m_hWndToolbar, TB_SETBUTTONINFO, m_buttonID, (LPARAM)(&inf)); Inside this project's code there is this line inside one the header file: BEGIN_MSG_MAP(CRebarHandler) NOTIFY_CODE_HANDLER(TBN_DROPDOWN, onNotifyDropDown) NOTIFY_CODE_HANDLER(TBN_TOOLBARCHANGE, onNotifyToolbarChange) NOTIFY_CODE_HANDLER(NM_CUSTOMDRAW, onNotifyCustomDraw) NOTIFY_CODE_HANDLER(TBN_ENDADJUST, onNotifyEndAdjust) MESSAGE_HANDLER(WM_SETREDRAW, onSetRedraw) END_MSG_MAP() It has already defined that for each TBN_TOOLBARCHANGE call, it will trigger the function onNotifyToolbarChange. For this example, it is triggered by IE. Inside my code, I need to trigger that particular function. And before that I need to trigger the TBN_TOOLBARCHANGE`. I just want to know how can it be done inside code, for example under a conditional statement.

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  • Calculate time taken by each cpp file to compile in VS2005?

    - by Rajiv Podar
    Hi Guys, I am writing a tool which can be used to make the matrix for the current performance of the project. For that I required to get the time taken by each file to get compiled. I tried with the following option but didn't succeed :( Tools-Options-Proejcts & Solutions - VC++ Project Settings - Build Timing- Yes From the above option I am able to get the whole time taken to build the solution but my problem is to get for each one. I am using VS2005 So anyone is having any idea then pls revert back ASAP....

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  • c++: see compiled object layout

    - by horsthahn
    Hi, is there a way - much like the way i can see the result of preprocessing when using 'gcc -E' - to see what my objects look like once the compiler compiled them into object files? I am not too good in reading assembler, so an advice to get the results as text would be nice .. or at least a little 'howto read the constructor intructions' or 'howto find the constructor' ... I am talking about gcc/g++, but a solution including msvc would be fine. Thanks!

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  • Stylesheets loading but styles not showing...

    - by echobase
    Hi- I have a website I created in VS2010 and am trying to run with IIS7. My website starts in all major browsers but for some reason the styles are not applied even though I've confirmed using Firebug that the stylesheets have indeed loaded. Also, when I use the inspect tool to click on an element, I can see in the right-side box the specific styles that are supposed to be applied. I thought this might be a permissions issue but I think I've got those set properly. Any help would be appreciated. Thanks.

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  • how can I make a "downstream only" copy of a file in TFS

    - by jcollum
    I've got this SQL script that needs to exist in two places in source control. I want to have only one real copy of this file and keep a virtual copy of the file in the other solution. One is needed for a unit test and the other for a development tool. The files, should, by definition, always be the same. If they have differences then there's a problem with our process. In Sourcegear I could make a virtual copy of a specific version of a file and keep it somewhere else in the source tree. That doesn't seem to be possible in TFS. Is it possible in SVN? So what are my options here? Branching/merging -- which is what the TFS team says I should be doing here -- means just another step that I have to remember to do. Plus it isn't automatic and I would prefer that this be automated. Is there some way to run an exe on checkin of a specific file? I'm thinking if I could do that then I could do a checkout-edit-checkin of the downstream copy of the file.

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  • Grid view w/ progress bars?

    - by Mark
    Trying to decide on the best element to use for a grid view, pretty much exactly like the one you'd see in uTorrent or any other upload/download client. Specifically, I want to have a 'progress' column too (with progress bars). Using VS2010/.NET4. What would you recommend?

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  • This is a valid C code but not a valid C++ code?

    - by claws
    In some library I'm using (written in C) its StorePGM(image, width, height, filename) char *image; int width, height; char *filename; { // something something } All functions are defined this way. I never seen such function definitions in my life. They seem to be valid to MSVC but when I compile it as C++ it gives errors. What is it? some kind of old version C?

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