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dantz · Oct 19 '11, 10:02 PM

Hi,

Can someone please help me convert my C structure/function into C#? I really need this badly...
I believe I can call the DLL properly if I have able to correctly convert the function and marshal properly my structure.

Here is my struct and the function that uses it:

Code:

typedef struct UIclient_info {
	char name[50];
	int age;
	SECONDUSER *stParent;
} FIRSTUSER;

...

dantz · Sep 15 '11, 06:47 AM

Hi,

I have an unmanaged C library that has calculation functions.
The function has to open a binary file to get data reference.
Then returns a "ReadError" or the result in a User defined structure

Code:

MyStruct Calculate(int itemid, int input1, int input2, double input3)
{
//initialize variable
MyStruct *resultAns;
double item1_result = 0;
double item2_result

...

apaka · Jul 31 '11, 04:29 PM

Unmanaged code calls my functions. In first function I sould pass back pointer to my managet object. Sometimes later some of my othrer functions got called with that same pointer as one of parameters . I sould dereference it use it to perform some calculations and then if it is not neaded dispose of it.
To cut the story short I need to pin that object so that GC won't move it til I dispose of it. How to do that in C# ?
...

Alex Dransfield · Apr 18 '11, 06:18 PM

I'm attempting to create shapes on a Microsoft Office Word document to model the layout of tables in a room. I've found a nice article (http://support.microsoft.com/kb/316384) that demonstrates how to create tables and text, but it doesn't mention anything about shapes. Is this possible or am I just dreaming?

apaka · Feb 17 '11, 05:01 PM

Does anybody know a working sample how to write thumbnail shell extension that works on XP, or give me a clue how to implement IExtractImage2 interface and requied structs? Thanks in advance.

Ivan Stefanov · Dec 3 '10, 11:12 AM

Hello, I have the following problem:
I created a website project and I want in that website to be make a button, which will export some data in an excel file. This is the code that I have:

Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Excel = Microsoft.Office.Interop.Excel;

...

dvanmil · Oct 1 '10, 09:00 AM

I am having problems with Window Messages. I want to send the handle of a VB.NET winform to a VB6 application. The code I have used seems to work ok, since the message arrives at the VB6 app. However, I have a problem that sometimes I get an error stating that it is not possilbe to read or write to the memory and that memory might be corrupt.
I have no idea what is causing this problem as I think I release the memory at the end of my procedure....

dicoy · Aug 30 '10, 01:17 PM

I succesfuly generated an excel file and populated it with a table from an MySQL query (if anyone is interested in the code, just ask) but I'm having problems putting it for download. I can save the file to disk and the call it with response.WriteF ile(), but I can't seem to find a way to have the excel file saved to memory (RAM, not the HDD) and call it for download from there.

I'm using VS 2005, C#, Excel Interop 11.0, and I have...

dantz · Aug 11 '10, 10:40 AM

HI Everyone! Hope someone can help me.

I am loading a flash movie using the AxShockwaveFlas hObjects Reference.
Then after sometime a white background will just show (no more movie) with circle that have Exclamation Point image in the middle.
I have been using this method since flash player version 9.0. So I assume the latest flash version has something to do with it.

Does anyone have any suggestion or...

arjun404346 · Jul 13 '10, 12:30 PM

Hello all,
I have to send a pointer from C++ to C#. How can I do this?
Error message I am getting on the C# program is
"Pointers and fixed size buffers may only be used in an unsafe context"
Please help.

MightyPolo · May 17 '10, 09:14 PM

Hello,
i have a question on my mind.

Iam developing application which uses twain layer to scan images. So far everything worked fine, but today while testing i got Attempted to read or write protected memory error.

Basicly what i do:
- set capabilities via imported dll calls of twain.dll
- call acquire call via imported dll calls of twain.dll

i get back IntPtr on the data from scanner,...

microface · Apr 10 '10, 05:43 PM

Yes I have googled, and found lots of supposed answers to this problem of using P/Invoke but everything I found, and everything I tried either caused exceptions, or simply failed to fill in the struct.
So here is my problem

Code:

typedef struct tagEdsDirectoryItemInfo
{
    EdsUInt32   size;
    EdsBool     isFolder;
    EdsUInt32   groupID;
    EdsUInt32   option;
    EdsChar     szFileName[ EDS_MAX_NAME

...

awilliams · Feb 11 '10, 11:42 AM

I am trying to implement an interface into a database API.
The API was originally designed for C, but has been used perfectly successfully in many programming languages (C++,Delphi/pascal even Cobol and VB)

The API is like this:
One declares a structure (actually a utility generates the declarations), which in C would be something like this

Code:

struct Customer
{
  short l;
  short typenr;

...

Happy2006 · Feb 3 '10, 02:11 AM

Hello

I am trying to call a function in C from C# though c ++

so basically C# -> C++ - >C

In C#, I have byte[] bytes - which reads the information from the file. I am passing the byte array and the size to C++ .

In C++ I get the byte array and the size but I am not able to convert to the specific data types.

Code:

void Image::OpenMemFile(array<Byte>^ data, unsigned

...

eck3ko · Mar 3 '09, 07:03 PM

Hi everybody i really need your help im completely lost :S this is what i need:

I have a c++ dll that uses MFC.
I need to create an instance of a class inside that dll in a c# project
I need to end with another dll to add it as a reference to other projects.

I have found many "solutions" but i just get confused :S
Pinvoke (just call functions but cant create an instance...)
create...

Search Result

How to convert/marshall C Function and DLL Structure type to C#

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How to pin a pointer to managed object in C#?

Is it possible to create shapes in a Word document using C#?

Thumbnail shell extension .NET

How to make a website that is able to export an excel file?

MarshalAs COPYDATASTRUCT and SendMessage

How do I generate an excel file for download without writing to disk?

Winforms-Flash Interop: White background error with exclamation point

sending pointer from C++ to C#

Attempted to read or write protected memory = memory leak?

3rd party dll interface to c++/cli .net 2.x

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Convert array<Byte>^ data to const byte* data

Create an instance of a class inside a c++ dll in a c# project