I was surfing the next to get some of the powerful elements that .NET has over other langauges when it comes to VB.NET and I was told to learn delphi.
Since this is a VB.NET forum I was hoping you guys could tell me why I should stick with VB.NET over a language like delphi.
I need to send a short string, (less than 30 bytes, but sent every second), from one VB application, to a Delphi application.. is this possible, using CopyDataStruct, WM_COPYDATA and SendMessage functions in Windows?
View 1 RepliesI am creating an Excel add-in written in VB.NET. I would like to bind KeyDown and KeyUp events to the spreadsheet to record when the user presses and releases the arrow keys while navigating the spreadsheetIdeally, these events would be built into Excel alongside the native SheetActivate and SheetSelectionChange events, for example. Alas, they are not.
View 1 RepliesI get to convert a Delphi application to VB.Net.My last project i had to convert a Java app to VB.Net.Anyway I have most of the application converted however there are a few items that i have been unable to find the .Net equivalent. Most are from the Delphi. Sysutils class.
TSearchRec
FindFirst/FindNext/FindClose
faAnyfile[code].....
In Delphi when we needed to allow the system to finish painting an object or something like that we could add a processmessages that would then let the system finish what it was doing before going on with the code.This was always handy when we wanted to show a message like "Please wait"before the start of a lengthy process.So then. What is the equivalent way of doing this in VB.
View 1 RepliesSuppose in .NET (don't care what language) I want to show a user a PDF, Word and Excel file together. I am trying to replicate a document process where a user might have a PDF file and he would like to attach a WORD file and an Excel file let's say to make a stack of documents (that I would save in some directory). Then he would like to click on a button and see a stack of these documents in 1 application of some sort.How can I display the stack of documents WITHOUT first opening WORD, then openinig EXCEL and then openining ADOBE ACROBAT - this would be really annoying for the user. I would like one unified application or some idea to mimic one in .NET that can just show all 3 documents as if they were printed one after the other on paper. (I hope I am explaining this clearly)
View 2 RepliesI have a not too complicated problem which I do not know how to solve in vb2010. Currently I have a recurive routine for finding files/and or searching. With a recursive routine I never complete the call until the end and process growth is significant enough to radically slow down the process with the now large stack. To make maters worse, I use precoding routines which will take wildcards. which are these:
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If I have a low level dll called low.dll. I then create another dll, say my.dll that references low.dll.
Now, if I create an application that references my.dll, I should not have to reference low.dll in the application correct?? This does not seem to be happening. The application will not compile as it cannot see low.dll, even though it does not access it directly.
How do you change an application level settings after compiling? I've searched Google and am at a loss. I've tried modifying the APPNAME.config file in the deployment directory but it doesn't change the application level settings.
View 3 RepliesI was reading a couple of articles a while back which I think described a behaviour where you can, in a .net application (specifically VB.net), allow an exception to occur, and then handle it in some kind of application-level exception handler, as opposed to within a Try/Catch block. My google-fu is weak at the moment, so I'm not having much luck guessing what this feature is called in order to find information about it.
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I need to store a value globally (application level). This is part ID retreval program, procedure will return teh Max ID number thena i need to store the retreved value gloablly, so that if the user open many intance of teh same form i can use the gloabl value, to send Unique ID numbers to each form.
View 4 RepliesI bet someone already asked this but i cant seem to find it. Ok i need is a global settings that can be updated which will affect all users. I was using xml files in the program filestill now and I need to get around using this because the files can be delete or over written incorrectly. I started using the settings option and realized application level is read only and i cannot use user scope because then it wont be global settings. Is there an alternative to this.
View 5 RepliesI have been trying to build an application for which I need to set low-level keyboard hooks. I thing I am trying to accomplish is that when I press the key "a" I want windows to think I have pressed the key "b". But the problem I am facing is that when I press key "a" it produces "ab". I am providing my code below.Also I would like to know how to detect double and triple key presses (e.g. shift + a and ctrl + alt + b). [code]
View 2 RepliesI have a program that I would like to create application-level MouseEnter and MouseLeave events for. Basically I have an app that I'd like to leave open that would be very opaque when not in use, and when the user moves the mouse anywhere within the bounds of the application, it becomes solid, and when they move their mouse away from the application, it becomes opaque again.
The obvious problem is that MouseEnter and MouseLeave are control-specific and so they fire every time you move over a button or menu or whatever, so Leave and Enter are constantly firing even though you haven't "left" or "entered" the application.
So, is there any way to create mouse events that only fire at the application level?
been banging my head on this, i need to get the applications path, then go up 1 folder then into another. As i have a main app and sub apps.
So were Application.StartupPath()is for example:"C: Main app folderSub app folder"How do i then go up a folder to"C: Main app folder"I Know it needs some string removal using on it but i can seem to get it right, after which i could then use Application.StartupPath() 'string removal here" & " ools"to navigate to another sub apps folder etc.
How to add application level error handler in vb.net win forms
View 1 RepliesI have a table, lets call it Objects. It has a predefined set of records looking like this:
ObjectId ObjectName
1 Salmon
2 Trout
3 Seabass
4 Shark
Etc..
So, this I would like to implement somehow as an enum. But what's the best way, implement it in the database creating tables for it or in the application logic in an CommonEnums codebehind file etc?
In Visual Basic 2008, there's two different ways that I know of to accomplish the same thing:The Dim on the member level:
Dim counter1 as integer = 0
Dim counter2 as integer = 180
Public Sub SampleSub1()
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I have hosted a website in a server using ASP.Net 2.0, i have a web.config in the root folder and also one in the Admin folder, but the admin folder is not a virtual directory and i dont want to create.
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I have created a simple program which uses a two tier structure of SQL Tables.At the top level, one record holds the date of the activities and linked to it using its primary key as a foreign key, three subordinate tables hold time stamped records.The issue I have been unable to solve is that before adding any of the lower level records for a given date, a newly added top level record must be saved to the database.Doing this manually is simple - but can I rely on my users to remember to do this before they start plugging in the lower level data?I thought not, so I am looking to save the top level automatically.I've failed miserably but I refuse to believe that it's not possible.
View 14 RepliesI am using Delphi 7 to try to use a .DLL created by VB.net. When I run TDUMP.EXE on the .DLL, it reports no exported data available. The VB.Net .DLL uses "RaiseEvent" to return data.[code]
View 1 RepliesI have multiple level of For Each and in each level, i have a Linq that is the 'In' criteria as in:
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It will go inside each for (because the value is not nothing), however, it will only loop (next) in the very inner 'For Each t In tFor'. After it is finish inner loops, the outer Fors' or Next will not execute... even thought there are more than one values in that 'In'... like 'sFor' or 'fFor'. i've noticed while debuging, while break at the for (for example 'sFor', before stepping in), i get the error message:
"Enumeration yielded no results" when i expand the result for that variable and it will not step into it. but if i do not expand the result, it will step in. It seem that some how, once an element is accessed for that 'In' collection, it breaks (meaning does not loop for the rest of the elements) the next for that collection is this a bug or am i missing something in Linq? BTW: i believe it has something to do with the SqlDataReader in the Linq. I'm working with IAsyncResult.
.NET converter (either C# or VB.NET)? I've inherited a bunch of Delphi code, never seen Pascal before and rather than learn it, I'd rather just try to use an automated converter, if available, and clean up the code after that. Can't seem to find this kind of tool anyway I search
View 3 RepliesI've designed a Windows Service in Visual Basic 2005 that needs to call some functions from a DLL written in Delphi 5. If I try to add this DLL as a reference, I get this error:
"A reference to 'C:ProjectsServiceProMDPUpdateServiceMessageStubApplicationSPHost.dll' could not be added. Please make sure that the file is accessible, and that it is a valid assembly or COM component."
I assume that it is just not possible to add this DLL as a reference to my VB2005 project, since the DLL was written in an old version of Delphi, correct? This isn't a big deal, as I can just use the DllImport function from System.Runtime.InteropServices, but if it is possible, adding it as a reference would be preferred.
My other question is, how would you be able to call a function from the DLL using DllImport, if the function you are trying to call takes a Delphi record data type as a parameter (if this is possible)? If possible, would I need to pass each field in the record separately or would I be able to define a structure in my VB app that mirrors the record definition in the Delphi DLL and pass that? Or, would it be best if I just created another function in the Delphi DLL that took various string/integer/boolean/etc. parameters that I could call from VB that would then call the original function in Delphi? I tried searching the internet for this specific question, but I couldn't find anything that looked useful.
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I've gotten a DLL from a supplier. Most functions I can call just fine, but some crash (System.ExecutionEngineException, doesn't even do with a try-catch...). The thing is that the ones that work are called with simply types, and the ones that crash have a type/class/structure in it.The documentation states how to call with "Visual Basic" without stating version. Here's how it looks..[code]I did figure out to use "Integer" in stead of "Long" and the strings needed some work but are fine now.Now... The "Type" doesn't exist in VB.NET so what should I do. Tried a class but that didn't work.I can call the DLL with "bad" data and get a good reply, eg "this and that is wrong with the input", but when I set that straight it crashes. I suspect that it's when it starts to write in the memory allocated by me and that does not match what the DLL expect.
BTW when I look at the class I made, I can see that - at least VS - lists the members in an alfabetical order. Is that how it's arranged in memory and could that be the problem if the order is different from the one expected by the DLL. I would epect that the total size was the same irrespective of order, so the problem would arise when I try to read the data and I would get junk.
Dim ThisModule As IntPtr
Dim Proc As Process() = Process.GetProcessesByName("Sol")
For i = 0 To Proc(0).Modules.Count - 1
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I have made this code, and works perfectly, but now... i want to make it in Delphi, the problem is... i have not the enough knowledge for make it, and... in google, i haven't found the information i need.
I've got some functions I need to call that are in some DLL files that have been written in Delphi 5 in a VB.NET 2005 application. I'm able to use the DllImport function to access the functions just fine; however, I'm having an issue with the Delphi string data type and passing it to and from the .NET application.
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It takes two string parameters and one double. I can call this function from VB.NET just fine, but it will error as soon as it tries to use one of the string variables (so in this case, when it passes them to another function) and I've found that the string values in Delphi are junk when they've been passed to .NET. I'm guessing that the string objects behave and/or are encoded differently between .NET & Delphi 5, and that I have to apply some sort of Marshaling to the function parameters in .NET, but I've tried all of the different types of marshaling and nothing has worked. Unfortunately, I haven't been able to find anything about this issue on the internet.
Does anyone know how I can call this Delphi function from .NET and have it pass the string values in a manner so that they won't be corrupted when stored in Delphi?
I have a Delphi written DLL that exposes some interfaces to a vb.net application.
The interfaces inherit from IUnknown (but this could be changed if required), simplified example:
IWindow = interface(IUnknown)
['{E9A11D0B-8A05-4CBA-83FA-C5CC6818DF6E}']
function GetCaption(var Caption: PChar): HRESULT; stdcall;
end;
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Now I want to transfer a collection of IWindow to vb.net, and in the vb.net application I want to be able to loop through it with a for in loop.
I read that it's possible using IEnumerable/IEnumerator but I don't quite understand how to implement them. Are there any good tutorials about this, specifically showing the declarations on both side? Example code would be great.
Please note that I prefer not create a com dll that should be registered and imported. Currently I export a function that enabled me to obtain an interface.
I have a Delphi program that communicates with a vb.net dll that I created. The vb.net dll communicates with a Fluke scope meter via an RS232 connection. I have created a program that communicates correctly via RS232, giving me the anticipated value. Though, when I package this up as a dll and access the dll from my Delphi program I always receive a value of "1", rather than the value I was expecting (most cases a value in and around 240).I know that my delphi program is definitely communicating correctly with the dll and that my dll is definitely communicating with the scope meter
Here is my vb.net code:
Public Interface IFlukeComm
Function GetReading(ByVal Command As String, ByVal PortNum As Integer) As String
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This is the Delphi code I'm trying to convert to .net:
s1 := Copy ( s1 , 1,x - 1) + Copy(s1, x + 1,Length(s1));
I tried:
s1 = s1.Substring(x - 1, 1) + s1.Substring(s1.Length, x + 1)
But I get error's when the index is out of range. in Delphi it works fine.
Added one line to convert..
s2 := s2 + chr(3);
