I am using VB to enter a 3 digit number eg 550 into strnumber then split this number into 5 using left(strnumber,1) and into 50 right(strnumber,2) I then want to set these two numbers a say x and y and use them to built and IP address this is where I get stuck...
View 3 RepliesGetProcAddress Function Retrieves the address of an exported function or variable from the specified dynamic-link library (DLL).Lets say I have something like this:
Dim moduleHandle As Integer = LoadLibrary("C:myDLL.dll")
Dim methodName As String = ""
GetProcAddress(moduleHandle, methodName)
DLL should be win32 standard dll or .net dll.
How can I run the exported function if I have the address of it through GetProcAddress().If someone could supply some code it would be great.
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How to create an address book in visual basic? I have the VB2008 express. Just a simple one. FirstName, LastName and Phone. I should be able to add from there. The resulting file could be an excel based or text file. I do not have Microsoft Access at home.
View 6 Repliesi'm developing a program that must be able to create, delete and edit files or folders on a remote web address such as [URL]
View 2 RepliesIn my VB.Net app, I want to read in a load of addresses from a database and then use word to create address labels on an Avery template L7163 which is then printed to the printer.
However, I have two issues:
1. Before word prints, I'm asked to select the printer etc. not exactly the nice automated application I was looking for.
2. Even though I get a nice printed out doc I was looking for, I also get a nasty looking error at the end which "loops" until I close my app -2147417848: The object invoked has disconnected from its clients. (Exception from HRESULT: 0x800010108(RPC_E_DISCONNECTED))
Here is my code:
CODE:
I adapted the code for the actual mail merge by recording a Macro in Word As I manually ran one so I thought it would be ok.
I have to create a block of code that detects the Local IP address of connected adapter and returns it as string to a TextBox.
View 7 RepliesAre there any IP Address filters or masks available in Windows Forms as per following screenshot? A backslash shouldn't be allowed or it should be filtered somehow.
View 1 RepliesSocketException was Unhandled: Only one usage of each socket address (protocol/network address/port) is normally permitted I get this error every time i click collect a second time.
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Can anyone point me to some code which can help obtain the network address from the host IP and subnet mask?
View 3 RepliesI made web browser which consist address bar that I use it to type addressess in it i.ewhen I type [URL] it opens [URL] but when I go to anther page in google it doesnot show it's link in address bar lix InterntExplorer or other international browsers so how to show any link or any sub page's link in my browser address bar ?
View 1 RepliesI'm trying to use the DHCP API (using the references on pinvoke.net) to retrieve a computer's MAC address when given the IP address but I can't get the code to work. I've run all the C# code on pinvoke.net through the C#-to-VB converter but I'm stuck now.
Here's what I have so far. The value of res is always 5 (should be 0). Thing is, I can't find any documentation on what the return codes mean
vb
Private Sub GetMACDim client As String = "1.1.1.1" Dim server As String = "0.0.0.0" Dim si As New NativeMethods.DHCP_SEARCH_INFO si.SearchType = NativeMethods.DHCP_SEARCH_INFO_TYPE.DhcpClientIpAddress si.ClientIpAddress = Convert.ToUInt32(StringIPAddressToUint32(client)) Dim res As UInteger Dim oInfo As IntPtr
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' Use Your work Group WinNT://&&&&(Work Group Name) Dim DomainEntry As New DirectoryEntry("WinNT://Wokgroup") DomainEntry.Children.SchemaFilte
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Can someone please help me learn how to create a variable and property and use it?
View 5 RepliesI have to make a basic program that: Create a program with a simple interface that
1. Asks the user type his/her email address into a textbox.
2. When the user clicks the "Evaluate Email Address" button, one of two message boxes pops up: "That is a valid email address!" with an "Information" icon, or "That is an invalid email address!" and on a second line, "Please retype your email address.", with an "Exclamation" icon
3. To be considered valid, the email address must -include an "@" symbol, and -it must end in either ".com", ".net", or ".org" or ".edu" (I don't know how to check a string and test if its last four characters end with any of these and make it say not valid email address. I think I might have to use a case statement)
What I would like to do is create a command button that launches an email from outlook attaching the current word document to a set email address. I'm not fussed if the word document is saved or not as it is only the email receipent that needs it, likewise I don't mind if the code instructs the email to send of just opens it ready to be sent.I have read through loads of forums and tried loads of codes but cannot get any to work.
View 3 RepliesHow Can I create a Global Varibale for my vb.net project. When I LongIn I want to keep the user Id in a varible and I will Use it in deferent Forms. And The User name will be saver in the varible untill I close the Software.
View 1 RepliesI have a for next loop looping through a dataset.I want to create an instantce of a class for each row.How can I create another instance/variable for each row?
View 5 RepliesI have some code like:
Lookup(Of String)("Testing")
Lookup(Of Integer)("Testing")
And both of those Lookups work great. What I'm trying to is call the appropriate LookUp based on the type of another variable. Something that would look like...
Lookup(Of GetType(MyStringVariable))("Testing")
I've tried to Google this but I'm having a hard time coming up with an appropriate search.
How do I create a variable in Visual Basic?
View 4 RepliesWhere and how do i create a global variable for a combobox? I need to use it on different forms.
View 6 Repliesi am trying to create a table in a access 2007 database with the name stored in a variable wich the user inputs. For example, if the username entered by someone is "John", i want to create a table in the database also named "John". I have tryed this:
Dim mypath = Application.StartupPath & "\mydb.mdb"
Dim mypassword = ""
Di Cmd As OleDbCommand
[code].....
My app has a group of forms that do a specific work in different ways. I want to create a new variable of a form when I want with its name. So, I want a Function in this form :
Public Function GetNew (byref f as form ) as form
That give a form name and return a variable of that type. In other words, it must work as "dim f1 as new formx".
Okay, Im a newbie to VB, so how do you create a Global variable inside a sub.
View 6 RepliesI can create event prodcedures for form objects, but is there a way to create an event that triggers when a certain variable equals a certain value?
View 3 RepliesDoes a variable create a memory cell, or is it actually the memory cell, for example: Dim Answer As DialogResult
This is the explanation I have written for that line of "This line of code uses a Dim (Dimension) statement to declare a variable called Answer.
This variable creates an object to store the users answer to a dialog result." and this is the explanation that my friend said it was:
"This line of code uses a Dim (Dimension) statement to declare a variable called DialogResult. This variable is a memory cell to store the users answer to the dialog result."
How would I create a variable and assign it to another variable and when I change one variable it will be changing the other also?
View 3 RepliesI'm trying to create a collection of variable binding in a class.It is intended to look something like this:
Dim x as integer, s as string
Dim c as new VBindClass
x = 1
s = "Hello"
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Is there some function that allow us to retrieve a unique ID for a given variable and also get/set based on variable?
Update:At last, I've managed to found the answer. Here's the code:
Dim gh As Runtime.InteropServices.GCHandle = Runtime.InteropServices.GCHandle.Alloc(obj)
Return Runtime.InteropServices.GCHandle.ToIntPtr(gh).ToInt64
how to create a global variable for this situation: I would like to store who logs in to a system (like, who is currently logged in, when he logged in) and then use that info for a transaction form, which will look like this: which admin made the transaction).
If I were to use a global variable, it would mean having to pass it onto several forms right (eg: from login form to the forms that will use the log information). I'm also thinking of just having a config file that will store the said login info that will be changed everytime a user logs in.
I have a query setup on the start form in my project - it looks for a user level (1 or 2 right now) I want to display/hide items on the form based on whether or not the user's permission (derived from this query) is a 1 or 2.
My question is, can i create a public variable out of this query to use on any form until the application is quit?
The query will be formatted something like this:
Dim
ssSQL As String = "SELECT UserLevel FROM [Employees] WHERE "
ssSQL &=
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I've been looking at using PROPERTIES [URL] but frankly I don't understand it that well. Before I invest the time to read, understand, and truly comprehend this, I want to make sure it's the best way. My intended goal is to create my database connection string in a function/sub somewhere, then assign it to this project wide string variable, then I can use it in any form, project wide without having to recreate it.
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