VB6 ActiveX Dll Problem !

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  - 1
    - How to return and use a value from one method call to another Thanks Mark, then I have a few easy syntax questions on your response Let me first humble myself horribly in the public eye...let's be honest. Yes, I'm asking for some hand holding. I know these are basics but I need to know how to get rid of my errors so that I can carry on at least for now and be able to use the lastProductID. Keep in mind, I'm learning here. And do not ask me if this is a homework assignment, I have been in IT 8 years, mostly classic ASP is the problem....got into OOP just a year or two ago 1) how do I make the variables inside static, I assume with the static keyword but please show me 2) I tried this so far (didn't really break it out like you said, I need help with that) but here's what I tried: http://www.webfound.net/forum_posts/addp roduct2.tx t Errors: AddNewProduct(Common.Utilities.ExcelWrap per, int, Interfaces.ImportOperation.IWorkerDriver , string, string, string, string, bool, int, long)': not all code paths return a value - line 20 Unreachable code detected - line 115 Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 2
    - How do I Retrieve text from other programs? It is text in a graphical window (harder) !=) Yeah, I could do html, and maybe even figure out console, but I don't even know where to start for windows. Can you give me some place to start on for this Any kind of direction would help...I just don't even know where to look at this point. thanks. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 3
    - cannot find dll Initially it was not hardcoded, but I tried hardcoding it as well and it still does not work on any other computer. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 4
    - Calendar I 'm making a Danish Calendar and I want danish weekdays instead of english, thats why, the code you wrote won't work in this case. Thanks anyway Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 5
    - Rotating Two Dimensional Arrays I havn't went over your code t0o long BUT... just a guess: you you need to make a copy of the array before you start rotating code, DO NOT make changes to the copy, update the orgiginal array by reading off of the copy, hope this helps Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 6
    - Still Active Though Log Off Log On to other machine remotely. So far my boundary just for LAN connection. Cool... never thought it is Windows Service. Thanks a lot. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 7
    - OnClientClick Priority? i think you can change the button's type "submit" to "button". because if the button's type is submit.it will submit to server when you click it,and other feilds will be clear. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 8
    - where to find static definitions You only need to mark the class and methods as static. I changed your class to that (see below). Then you can use it like: Utilities.Conversion.DataReader2DataTable(...); /// <summary> /// Conversion Utilities /// </summary> public static class Conversion { #region Methods /// <summary> /// Creates a 2 dimensional array with data from a datatable /// </summary> /// <param name="_dt"> DataTable </param> /// <returns> 2 dimensional array </returns> public static object [,] DataTable2ObjArray( DataTable _dt) { object [,] _objArr = new object [_dt.Rows.Count, _dt.Columns.Count]; for ( int rowNo = 0; rowNo < _objArr.GetUpperBound(0); rowNo++) for ( int colNo = 0; colNo < _objArr.GetUpperBound(1); rowNo++) _objArr[rowNo, colNo] = _dt.Rows[rowNo][colNo]; return _objArr; } /// <summary> /// Creates a datatable given a 2 dimensional array /// </summary> /// <param name="_objArr"> Object Array </param> /// <returns> DataTable Created </returns> public static DataTable ObjArray2DataTable( object [,] _objArr) { DataTable _dt = new DataTable (); for ( int colNo = 0; colNo < _objArr.GetUpperBound(1); colNo++) _dt.Columns.Add(); for ( int rowNo = 0; rowNo < _objArr.GetUpperBound(0); rowNo++) { for ( int colNo = 0; colNo < _objArr.GetUpperBound(1); colNo++) _dt.Rows[rowNo][colNo] = _objArr[rowNo, colNo].ToString(); if (rowNo != _objArr.GetUpperBound(0)) _dt.Rows.Add(_dt.NewRow()); } return _dt; } /// <summary> /// Converts a Data Reader to a DataTable /// </summary> /// <param name="_dr"> Data Reader </param> /// <returns> Data Table </returns> public static System.Data. DataTable DataReader2DataTable(System.Data.Common. DbDataReader dr) { int maxField = dr.FieldCount; System.Data. DataTable dt = new System.Data. DataTable (); for ( int fieldCt = 0; fieldCt < maxField; fieldCt++) dt.Columns.Add(dr.GetName(fieldCt)); while (dr.Read()) { System.Data. DataRow _data = dt.NewRow(); for ( int fieldCt = 0; fieldCt < maxField; fieldCt++) _data[fieldCt] = dr[fieldCt]; dt.Rows.Add(_data); } dr.Close(); return dt; } #endregion } Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 9
    - Math with datetime?? Thanks, The most complex is computing the months and days as we dont know the days of months and how many leap years were within the two dates I quickly thought about this easy solution, but it is not 100% accurate: DateTime dob = DateTime .Parse(TextBox1.Text); int days = (( TimeSpan )( DateTime .Now - dob)).Days; int years = ( int )(days / 365.25); int months = ( int )(days / 30.4375); int involvedMonths = years * 12; int monthsSlack = months - involvedMonths; int involvedDays = ( int )(monthsSlack * 30.4375); int daysSlack = ( int )((days - (years * 365.25)) - involvedDays); Label1.Text = years.ToString() + "Years, " + monthsSlack.ToString() + "Months, " + daysSlack.ToString() + "Days." ; Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 10
    - Error code: 0xe0434f4d It runs off a drive called H:\ So yes it is a Network Drive as the letter is H on whatever logon you are on, but shows files depending on your logon. With my current logon I cannot access a Local Drive. I may talk to the network adminstrators to see if they can test for me. Thanks Anderw Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 11
    - app.config or settings.settings Then why when I create a setting it adds an app.config file to the project. You did state whether what I am trying to do can be achieved and how. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 12
    - closing app probs Perhaps your application is still doing something in the background Such as creating another thread which is still running and hasnt finished yet What does your application exactly do Are you sure your are not looking at the application .vshost instance in task manager whilst you are running an instance of VS with that solution loaded (some people do get confused) Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 13
    - calling an executable from within running app I have been looking for a couple of days now and I suppose I am just looking in the wrong places. As I have recently started migrating my knowledge from that of C / C++ to C# so I still have much to learn; However I would be most grateful if someone could point me in the right direction. Have also performed multiple searches and perhaps I am just not succint enough in what I am typing to find that which I seek. While keeping in mind I am also just now learning to program within Windows most all previous experience within C / C++ has been within Linux / Unix and previous to that was all assembly and C/C++ within DOS years back. So, I have much to learn reiterated once more. I am looking for something within the C# language that would be equal to that of the C - ansi / posix function 'system("foobar.exe");' So that I can call an executable from within a running app. TYVM in advance Erin Ferguson-Stange Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 14
    - Best way to marshal an array of C style strings so to marshal over the C strings, i would need to copy them over at offsets in the managed string Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 15
    - How can I control already open IE windows? Check this Capturing the Running IE Instances in C# Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 16
    - How to make a tabpage invisible from user? Help Thank you very much. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
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  - 1
    - Add a Menu to the IDE I want to Add a seperate menu to the visual C# IDE! is it possible...to do add a seperate menu to the default visual studio 2005 IDE. (Say after the HELP menu.) OR putting as another item in an existing menu. (Say in the TOOLS menu) how to do it!..is it possible Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 2
    - How to check whether the system is 32 bit or 64 bit ? Please check this thread and this blog which you might have seen. How to detect programmatically 32/64-bit Windows BOOL Is64BitWindows() { #if defined(_WIN64) return TRUE; // 64-bit programs run only on Win64 #elif defined(_WIN32) // 32-bit programs run on both 32-bit and 64-bit Windows // so must sniff BOOL f64 = FALSE; return IsWow64Process(GetCurrentProcess(), &f64) && f64; #else return FALSE; // Win64 does not support Win16 #endif } Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 3
    - how to call a function of another class Also remember that you can't access a method without a reference to the object or a delegate, the Dog class object doesn't know anything about the cow class, so it can't call "moo()" if it was a method of the cow class. Also, you should avoid naming instances the same as your class name, even in examples. the OP was better with dog dog1 = new dog() Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 4
    - Please help me with C# code Since this is a homework problem, I won't supply code. The math looks fine. Your coding is in need of help. Here is what the steps would look like on paper: PI = 4 PI - = 4/3 PI += 4/5 PI -= 4/7 PI += 4/9 . . . Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 5
    - Trim transparent whitespace from Image I would like to trim the alpha whitespace from an existing Image (read from a png). For example: A big transparent image with a small solid circle somewhere shall be trimmed down to a rectangle bearing the circle. Is there some high level method I can use Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 6
    - The process cannot access the file **HARD ONE** I think someone gave a solution in this forum somedays ago. I couldn’t find the thread, so, let me try to reproduce it: System.Drawing.Image img = Bitmap.FromFile( @"c:\my_example_image_path.jpg" ); Bitmap bmp = new Bitmap(img); img.Dispose(); I think it was something like that. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 7
    - web parts deploying problem i am using visual studio2005.after deploying the webparts (publishing the website and creating the virtual directory),the web page is displaying.but the drop down button is not displaying .also iam not able to drag and drop web parts. Is there another way for deploying web parts(without using share point server). please reply me Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 8
    - Reflection For Class Hi Beech, Thanks for ur reply. it helped me lot in fixing my problem. i'm currently working on my project using ur guidance... Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 9
    - Navigation from one form to another in Windows applications (C Sharp) I simply want to get the user from one form to another at the click of a mouse, preferably transferring data as well. When I last did anything with Web applications, the way (or one way) to do this was via Server.Transfer(...) . For instance, you might have a 'home' form with several options accessed from buttons and/or other controls. Here's a piece of sample code from a Web application: private void btnCorrections_Click(object sender, System.EventArgs e) { string StudentID=this.txtRefNo.Text.ToString() ; Server.Transfer("ListTrainees.aspx ID=" + StudentID); } I simply need the equivalent to this for Windows applications via C Sharp (assuming it exists). When the above executed, the current form just vanished and the new one ('ListTrainees') loaded and displayed. The nearest I've seen to this for Windows forms is this (going from form 1 to form 2 via a button click event on form 1): private void button1_Click(object sender, System.EventArgs e) { form f = new Form2(); f.Show(); } Firstly, this seems a bit elaborate compared with 'Server.Transfer' (creating the new instance of form2, and so on). More important, it seems you need to keep Form 1 open in some sense (although you can hide it via the 'Hide' method - as I think you pointed out). However I'm not happy about building up a whole lot of hidden forms as use of an application progresses. The 'Server.Transfer' method seemed simply to move the user from Form1 to Form2 (transferring data too, if necessary) & that's all I really want to do. I feel there must be an equivalent for Windows Forms but maybe there isn't. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 10
    - Which Namespace contains NullToString ? My best guess is that you are attempting to use the new string.IsNullOrEmpty method for parameter checking in your case. You would do something like if (string.IsNullOrEmpty(inputEmail)) throw new ArgumentNullException("inputEmail"): // process as normal... Regards, Dave Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 11
    - Format CSV using C# Thanks Tony. Got some idea. Please post real sample. never did so much c# coding. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 12
    - Back/Forward buttons Hi, I read your post and i got a popup window saying "PROPERTY VALUE IS NOT VALID" Do you know why this is Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 13
    - IO Exception when Deleteing a File What is thumbnailinfo Does it hold an image, because if it does you have to dispose of it to release the file handles. Otherwise you'd have to wait for the garbage collector to do it for you but you never now when this is gonna happen. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 14
    - Creating Sequental filename. You could also consider appending the time, either as HH:mm: ss or as something like the number of seconds since midnight. If you're making the files faster than that, you could add more precision. Before creating a file, you would check whether it already exists (just in case you make two very quickly, or the system clock changes), and if so, change the filename (by adding 1 to the # of seconds, or appending a letter or something). Edit: After looking at GetTempFileName, it seems that it does something similar, at least based on the current time. Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 15
    - Initializing base class with a child class instance Thanks. It helped Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#
  - 16
    - unique song identifier from an mp3 Hi, Here is an idea. An mp3 file is just made up of bytes like any other file, so you could create a hash of the mp3s bytes, if you find two mp3's with the same hash you have the same file. Two files with equal bytes wil generate equal hash values, so in theory two mp3s that are the same have the same bytes and should create the same hash. Of course this will depend though... on sampling rate, on any gaps at the start of the track, maybe, but mostly on the sampling rate of the mp3. I have no idea whether a normalised mp3 (i.e. re-encoding the mp3s so it's sampling rate is a common value) would work. In theory it should. You'd need to look into it, try it out, see how it works with different files, just give it a go and see how likely it is to work. Here's an example of how to generate a hash value for a file using SHA1. Code Snippet using System; using System.Collections.Generic; using System.Text; using System.IO; using System.Security.Cryptography; namespace HashOfAFile { class Program { static void Main(string[] args) { FileStream file = new FileStream("C:\\Emails.mdb", FileMode.Open, FileAccess.Read); byte[] fileAsBytes = new byte[file.Length]; file.Read(fileAsBytes, 0, fileAsBytes.Length); file.Close(); SHA1CryptoServiceProvider sha1 = new SHA1CryptoServiceProvider(); byte[] hash = sha1.ComputeHash(fileAsBytes, 0, fileAsBytes.Length); Console.Out.WriteLine(BitConverter.ToString(hash)); Console.In.Read(); } } } Tag: Visual C# General VB6 ActiveX Dll Problem ! Visual C#

Nothingz

After compiling a activeX dll in VB6. I had tried to use it in my C# application :

[DllImport ("MyLib.dll",EntryPoint="Function1")]
private static extern int MyFunc (int _num);

-> I get an exception "Entry Point not found !"

It's my activeX Dll code :

public function Function1 (byval num as long) as long
.....

How to reuse this dll, Somebody help me !

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Re: Visual C# General VB6 ActiveX Dll Problem !

Ernst Kuschke

Hi,

Since VB6 is all about COM, you can have Visual Studio do all the work of creating a runtime-callable-wrapper (RCW) for your VB6 dll:
Simply add a COM Reference to this dll to your project by using the "COM" tab on the "Add Reference" dialog Wink

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Re: Visual C# General VB6 ActiveX Dll Problem !

Nothingz

Hey.

It worked ! Thanks you very much !

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