I have few questions in mind. I am new to this field of Visual Basic so don't make fun of me.
1.) What are the differences between VB.NET and VB?
2.) I need to develop basic apps for Windows.(like a notepad) Which one should I use?
3.) Is there an IDE available for both?
4.) If possible can you suggest me a good resource for learning VB or VB.NET.
Note: I know C and Java. I couldn't find a satisfactory answer anywhere.
Stackoverflow always provides the most precise answers.
1.) What are the differences between VB.NET and VB?
VB.NET is a modern, object-oriented language. VB (Classic) is its predecessor, and it's no longer actively maintained.
I don't know if that is what you are looking for, but a technical comparison can be found in Wikipedia:
Comparison of Visual Basic and Visual Basic .NET
2.) I need to develop basic apps for Windows.(like a notepad) Which one should I use?
VB.NET. However, if you already know Java, the C# syntax might be more familiar to you. From a functional point of view, VB.NET and C# are almost equivalent.
3.) Is there an IDE available for both?
VB.NET applications can be developed with Visual Studio, the most recent version is 2013.
The VB Classic IDE is unsupported as of April 8, 2008.
4.) If possible can you suggest me a good resource for learning VB or VB.NET
This is off-topic for Stack Overflow.
What is the difference between VB and VB.NET?
Now VB.NET is object-oriented language. The following are some of the differences:
Data Type Changes
The .NET platform provides Common Type System to all the supported languages. This means that all the languages must support the same data types as enforced by common language runtime. This eliminates data type incompatibilities between various languages. For example on the 32-bit Windows platform, the integer data type takes 4 bytes in languages like C++ whereas in VB it takes 2 bytes. Following are the main changes related to data types in VB.NET:
. Under .NET the integer data type in VB.NET is also 4 bytes in size.
. VB.NET has no currency data type. Instead it provides decimal as a replacement.
. VB.NET introduces a new data type called Char. The char data type takes 2 bytes and can store Unicode characters.
. VB.NET do not have Variant data type. To achieve a result similar to variant type you can use Object data type. (Since every thing in .NET including primitive data types is an object, a variable of object type can point to any data type).
. In VB.NET there is no concept of fixed length strings.
. In VB6 we used the Type keyword to declare our user-defined structures. VB.NET introduces the structure keyword for the same purpose.
for more details you can refer http://dev.fyicenter.com/Interview-Questions/dotNet-1/What_is_the_difference_between_VB_and_VB_NET_.html
and to develop windows apps , my best language is C# and you can choose VB.NET too
vb vb.net
it is interpreter based language. it is compiled language,use the cls.
not a type safe language. it is a safe type language.
backward compatible. not backward compatible.
Related
I always read that I should use decimal or similar for money and financial calculations (example). However as much I can see, all of the Business One SDK uses doubles? Is this okay? Am I expected to convert the double values to decimals every time I am doing calculations, than back to double If I want to set it for an API object (what I do currently)?
Note: The SQL database uses numeric(19,6) for these values.
Despite what it might look like in Visual Studio, the SAP SDK isn't really a .Net-native library - it's a .Net wrapper over a C/C++ dll using COM Interop.
I don't think that decimal is a native type in C/C++, and it's certainly not a basic/intrinsic type in .Net (unlike e.g. string, int, double, etc) - it's also slower to use because there's no intrinsic CPU instructions for Decimal operations (unlike the basic types).
Because there's no equivalent in C/C++, it would have to be translated to a type that can be understood by the underlying library - and that type would likely be double anyway.
I'm looking for in depth information about Visual Basic. For example, Scoping and binding behaviors, subprogram and package facilities, etc.
Are there any resources, preferably accessible online, that you know of?
Edit:
I'm looking for information such as: VB uses lexical or dynamic scoping; binding for X happens at compile time/load time/runtime and is static or dynamic. Basically a more in depth look at the characteristics of the language.
I hope that helps.
When you need a complete description for a language, always consult the manufacturer specification. In case of VB.NET, you can get the language specification here (VB.NET 2003)
The Visual Basic .NET Language Specification provides a complete
description of the Visual Basic .NET language.
They are pretty much the same as C#.
http://support.microsoft.com/kb/308470
http://www.harding.edu/fmccown/vbnet_csharp_comparison.html
If this is not what you are looking for please add more details on what you are looking for and why.
.NET is lexical scope, a variable name is only accessible within the scope it is defined.
Most items are bound at compile time unless they are lazy loading (load when needed) or dynamic (compiled at run time).
You can check http://en.wikipedia.org/wiki/Visual_Basic
It sound like you would benefit most from a intro/tutorial more then a facts sheet as an intro will explain each concept as it comes up. If you already know a programming language you might also look for an intro to VB specific to that language (like VB.Net for Java programmer). See also http://www.csharphelp.com/2005/11/net-framework-for-java-programmers/
I've got a game in VB6 and it works great and all, but I have been toying with the idea of creating a scripting engine. Ii'm thinking I'd like VB6 to read in flat text script files for me and then lex/parse/execute them.
I have good programming experience, and I've built a simple C compiler, as well as a LOGO emulator before.
My question is:
Are there any tools that I can use, like Lexx/Yakk/Bison to help me? How should I approach this problem in regards to lexing, parsing, and feeding the commands back to VB6 so I can handle them? Is this idea a BAD IDEA in the sense that there are too many obstacles in the way (For example, building minesweeper in assembly, though not impossible, is very difficult, and a bad idea.)?
Use the Microsoft® Windows® Script Control because it is easy to integrate into existing VB6 applications. The control supports VBScript, JScript, or any other "Active Script" implementation.
I have used the Windows Script Control in four projects and it works extremely well. Very easy to integrate. I wish Microsoft would have given us a replacement in .NET, and made it as easy to use. (I understand the control is not needed in .NET, but having the ability to simply create an object that handles everything is nice.)
Windows Script Control
The Microsoft® Windows® Script Control
is an ActiveX® control that provides
developers with an easy way to make
their applications scriptable. This,
in turn, enables users to extend
application functionality through
scripts, much as they do with macros
today.
INFO: Where to Obtain the Script Control at http://support.microsoft.com/kb/184739. Includes links to other howto support articles.
Chapter 13: Adding Scripting Support to Your Application at http://msdn.microsoft.com/en-us/library/aa227413(VS.60).aspx
Designing a Calculator at http://msdn.microsoft.com/en-us/library/aa227421(VS.60).aspx
How To Use Script Control Modules and Procedures Collections, Inserted from http://support.microsoft.com/kb/184745
How To Use the AddObject Method of the Script Control, Inserted from http://support.microsoft.com/kb/185697
SAMPLE: SCRIPTEX.EXE Uses the ScriptControl with Visual Basic, Inserted from http://support.microsoft.com/kb/189484
Windows Script Control can be downloaded at http://www.microsoft.com/downloads/details.aspx?familyid=d7e31492-2595-49e6-8c02-1426fec693ac&displaylang=en. (Supported Operating Systems: Windows 2000; Windows 98 Second Edition; Windows ME; Windows NT; Windows Server 2003; Windows XP)
MSDN Search of "MSScriptControl.ScriptControlClass" at http://social.msdn.microsoft.com/Search/en-US?query=%22MSScriptControl.ScriptControlClass%22&ac=8
MSDN Search of "Windows Script Control" at http://social.msdn.microsoft.com/Search/en-US?query=%22Windows+Script+Control%22&ac=8
MSDN Search of "MSSCRIPT" at http://social.msdn.microsoft.com/Search/en-US?query=MSSCRIPT&ac=8
Unless you're doing it for your own instruction, you may want to try using Lua: VB6 - Lua Integration
If you're willing to use VBScript rather than VB6 you might be able to just use the MSScriptControl to run the commands rather than creating your own. Here's an article discussing using it from a .Net app, though it's an ActiveX control so should give you quite a bit of flexibility.
The control can be downloaded from here.
I've actually seen some quite reasonable implementations of compilers/interpreters in VB6[1] - It's not the language I would choose (few functional features, insufficent static type system), but with experience, you can outweigh these drawbacks and be quite productive - So why not.
You can use the GOLD parser generator that supports VB6 as a start.
[1]: Somewhere on PSC or in this download repository I think ...
Note that there is the MSScriptControl too.
There also appears to be an additonal alternative for VB6:
SadScript is an variant of VB6 most prominently used for VB6 as an scripting engine in MMORPGS .
See here for more : What is sadscript? Can I use it in vb.net? Why hasn't anyone I have asked heard of it?
We are in the process of creating active-x controls used within our application.
Since Microsoft stopped supporting classic Visual Basic, is it wise to use Visual Basic to develop the Active X control or the latest VC++/ATL/MFC libraries provide more feature where we can create controls faster by leaving Visual Basic flexibility?
We will not be able to use .NET/VB.NET/C# since the application is supposed to work inside containers and containers may not support latest .NET runtime.
Any other language is best fit for Active X control development other than VB and VC++?
I, personally, would recommend using Delphi for this. It is still actively developed, and has the control you get with C++, but a rapid development environment more like VB.NET.
#nobugz: If you are really interested what is ActiveX in Delphi, look at docwiki. Normally it is 100% source code (yours + VCL, VCL is also available as sources) with autogenerated COM wrappers. So all potential security problems are also in source code. If you find a security problem in VCL, please send a bug report to Quality Central.
Here is a good example on how to create ActiveX Controls with C# .NET
http://www.codeproject.com/KB/cs/CreateActiveXDotNet.aspx
By all means VB6 is the best language. After reading your question I feel that you are a VB6 developer. If you know VB6 and use it then why hesitate using it for producing ActiveX controls.
I program in Delphi as well as VB6 along with VB.NET and C# but creating ActiveX controls is the easiest in VB6 compares to all other development tools.
If you are hell bent on not using VB and if you are looking for an alternative then try out PowerBasic (commercial - very costly) or PureBasic (commercial but affordable) Get it from here or better still MinGW (a GNU C++ compiler).
I have to say that VB6 with a good book like Developing COM/ActiveX Components with VB6: A Guide to the Perplexed you will be up and running faster.
In Ironpython site exists references to a language called VBx using DLR. But i can't find any reference to this in google. Where is it?
Edit: Is a Implement of Visual Basic 6.0 in DLR? if yes is so cool. Is more expected for people using VB6 yet and can't migrate because big frameworks.
From this mailing list post:
VBx was an implementation of Visual Basic on the DLR. It was first meant
to be in Silverlight, but the VB team decided they'd rather put VB.NET in
Silverlight rather than build a new implementation up from scratch. So, VBx
is on hold.
Apparently it's an implementation of VB in the DLR:
http://www.mail-archive.com/users#lists.ironpython.com/msg05933.html
Straight from the mouth of Paul Vick (long time VB architect)
What is VBx?
VBx was one of the four language implementations that were originally driving the design of the DLR, the other three being IronPython (from which the DLR was extracted in the first place), IronRuby and Managed JavaScript.
VBx was intended to be a dynamic version of Visual Basic.NET or a .NET version of Visual Basic 6, whichever way you want to look at it. It was primarily intended as a testbed for the flexibility of the DLR, secondarily as a testbed for a more dynamic version of VB.NET and tertiarily (is that a word?) as a scripting language for Silverlight. It has fulfilled its primary goal and the designers of VB.NET decided that they want to pursue goals two and three within the existing VB.NET language, rather than producing yet another slightly different incompatible version of VB. (You already have VB.NET, VB, VBA and VBScript.)
Managed JavaScript was also abandoned, the team was folded into the IE team and is responsible for the ECMAScript 5 engine in IE 9.