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string s = TextBox1.Text
TextBox1.Text = TextBox2.Text
TextBox2.Text = s
TextBox1.Text = Textbox2.Text = ""
Christian Graus - Microsoft MVP - C++
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I am pasting your reply here and responding to it. Please respond to the board. It may help someone else to read this.
I am learning VB.Net and doing it all on my own so that I can better
understand it from a financial standpoint.
Bare with me because I am learning and not a pro, not even close to an
amateur!!!! :)
I put the code into the Private Sub Form1_Load that you posted on the
board and
Dim String as Text
But something still isnt right........
Am I missing something? Sorry for being an idiot!!!
The code I gave you was meant to provide a template, sorry that I assumed that was obvious.
First of all, to add a button, just drag it onto the form in the design view. I believe double clicking it will add a method that is called when it is clicked, otherwise the properties window has a lightning type icon, that shows you possible events, you can type a name into the 'Clicked' event to define one.
Now, your two text boxes have names. You can change them in the properties box as well ( right click on the textbox and choose properties, although if the window is visible, just clicking will do ). A TextBox has a Text property, so TextBox1.Text assumes one of your text boxes is called TextBox1. I believe that in VB.NET, Dim s as string is the right code to create a temporary string variable ( not string s ), so if you substitute the names of your textboxes,
Dim s as string
s = Textbox1.Text
Textbox1.Text = Textbox2.Text
Textbox2.Text =s
should swap the strings. And if you create a button/event handler for the 'clear' operation,
Textbox1.Text = Textbox2.Text = ""
will clear the text boxes. What's happening here is that all the other values get changed to the last one. You can put it on two lines if you find that clearer:
Textbox1.Text = ""
Textbox2.Text = ""
I hope that helps....
Christian Graus - Microsoft MVP - C++
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Thanks!!! I think I have a good handle on it now from reading this post.
I'll try this tonight and let you know how it goes tomorrow. This is great information. Thanks again Christian!!! 
JB
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Ok I have got it working.......
I was missing a few main points, one being the click event for the Form1.
In order to clear both textboxes, you will need to go to the form, Base Class Events, then Click and write code as follows:
Textbox1.text = " "
Textbox2.text = " "
this clears the textboxes by clicking the form itself.
Thanks again Christian Graus
Jason Baggett
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hellow to all
i am trying to make insert statment into a access database ..
i write the folloing statment
MyOledbCommand.CommandText = "Insert Into Messages " _
& "(firstname,lastname,username,password,date) " _
& "Values (" & "'" & String2 & "', " & "'" & String3 & "', " & "'" & String4 & "', " & "'" & String5 & "')"
but i keep getting the msg Syntax error insert statment ..
the more odd thing is that i use the same statment in other form and it run's fine !
what could be the problem ..
i had tried million thing and possibilities nothing is working 
thxx a lot
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maybe the problem isnt with your statment, but with your connection?
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You may wnat to check the values of each string, If one of them contains a single quote mark, then your insert statement will fail.
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"Date" is a VB reserved word, don't take it a habit of using reserved words, however u can still use it as a DB fieldm enclose it with "[]"
MyOledbCommand.CommandText = "Insert Into Messages " _
& "(firstname,lastname,username,password,[date]) " _
& "Values (" & "'" & String2 & "', " & "'" & String3 & "', " & "'" & String4 & "', " & "'" & String5 & "')"
good luck
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hello everybody,
first off i wanna say thanks to everybody behind this website, its a great source of knowledge.
now im having trouble adding mouse events to the cards being drawn using the cards32.dll functions, ive looked around but cant find anything that would explain what im supposed to do.
what i need is to be able to click/drag (interact) with the cards drawn using cdtDrawExt function.
thanks in advance.
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I'm attempting to tackle a problem I have no experience with. Does anyone know a good resource where that I can use to be able to interface with a barcode scanner in order to navigate a application. (The application I'm creating has mouse or keyboard input devices, only a barcode reader. It will ONLY allow a user to scan an object and progress/navigate throughout the application by means of a barcode reader.)
Any ideas?
shannon
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If you are using scanner with keyboard interface, its just as simple as typing from a keyboard. Use notepad, scan a barcode, the data read will be displayed in the notepad.
Hope it helps
:->
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There is no keyboard input. The user is using a industry barcode scanner to vehicle parts. The scanner is th only input device. Any ideas?
Shannon
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How does it interface with PC? is it RS232? or does it have additional peripheral like PCI Interface cards? . . . . In that case, I think you should be contacting the "Barcode Scanner Vendor" regarding the drivers or commands you will use to communicate with the machine.
If it is via RS232, try it with "Microsoft Comm Control", but still u need to know the commands you will be sending to the machine.
Hope it helps.
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Thank you for your suggestions! They did in fact point me in the right direction.
Shannon
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I show/hide different forms by defining the forms in a module:
Public Class formLibrary
Public Shared frmMain As Form
Public Shared frmComponents As Form
Public Shared frmNewProject As Form
....
End Class
Then I use the following to close the current form and open another:
Dim newFrmMain As New frmMain
formLibrary.frmNewProject.Hide()
newFrmMain.ShowDialog()
This is working perfect for all forms in my project except one. When I attempt to open the frmNewProject, I get this error:
An unhandled exception of type 'System.NullReferenceException' occurred in Mule! Data Management Tool.exe
Additional information: Object reference not set to an instance of an object.
..on this line of code:
formLibrary.frmNewProject.Hide()
Has anybody ever experienced a problem like this?
Thanks
Brad
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Your form declaration is this:
Public Shared frmNewProject As Form
And you recieve an unhandled exception here:
formLibrary.frmNewProject.Hide()
The reason is because .Hide is not a shared sub procedure of the Forms Class, therefore you are required to instantiate a Form object instance.
For instance:
Public frmNewProject As New Form
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In other words, when you trying to hide a form that does not exist in memory 
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Thanks. That works (anyway it gets me through the code with no exception). But now frmNewProject does not hide. I can't select it but it is still visible.
Any ideas?
Thanks
Brad
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Do you have a code sample of what you have changed and how you are using .Hide? And what do you mean when you say
Brad Fackrell wrote:
I can't select it but it is still visible.
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The class is where my forms are declared:
Public Class formLibrary
Public Shared frmOpenProject As New Form
Public Shared frmMain As Form
Public Shared frmScoringJustification As New Form
Public Shared frmProjectName As New Form
Public Shared frmDatesAndLocation As New Form
Public Shared frmPOC As New Form
Public Shared frmArticulation As New Form
Public Shared frmCollectorsAndNotes As New Form
Public Shared frmComponents As New Form
Public Shared frmPrint As New Form
Public Shared frmNewProject As New Form
End Class
The code that I use to Hide and Show:
Dim newFrmMain As New frmMain
formLibrary.frmNewProject.Hide()
newFrmMain.ShowDialog()
When I execute this, frmMain loads and is active. frmNewProject is still visible (behind frmMain, frmMain is a small form; about 30% of the screen) but I cannot select it or any of it's controls.
Thanks for your help.
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I'm not quite sure why your frmNewProject would still be visible...but the reason why you cannot select it or any of it's controls is because you are showing your frmMain as modal.
Brad Fackrell wrote:
newFrmMain.ShowDialog()
When you use .ShowDialog, you are displaying your form modal, meaning you can not access any other form until you close your frmMain.
Going back to your frmNewProject, where are you showing the form in code? If .Hide is not used, is it possible to .Close the form? Just to make sure it is accessing that line of code.
I did a quick test with your class and placed a .Show and .Hide in two button events. It worked with no problems...so in theory, it should be working for you?
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Anonymous wrote:
where are you showing the form in code?
I have a btnClick that calls:
Dim newFrmMain As New frmMain
formLibrary.frmNewProject.Hide()
newFrmMain.ShowDialog()
...nothing else in the btnClick sub.
Anonymous wrote:
If .Hide is not used, is it possible to .Close the form?
No. I think it goes back to what you said about newFrmMain.ShowDialog() only allowing newFrmMain to be accessable.
In fact, after removing formLibrary.frmNewProject.Hide(), it seems like that line of code is doing absolutely nothing.
I've gone through frmNewProject with a "fine tooth comb" to see if there is anything that could be making it 'hang'...no luck finding anything.
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Try commenting out the newFrmMain.ShowDialog()...does your code execute the formLibrary.frmNewProject.Hide()? Give the debugger a try as well, and step into that line of code. It should be executing.
Also, where did you place the code to display the frmNewProject form? (formLibrary.frmNewProject.Show())? I am assuming you did show the frmNewProject...otherwise, the line formLibrary.frmNewProject.Hide() will execute, but you won't have a form to hide, therefore appearing like it did absolutely nothing.
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Anonymous wrote:
Try commenting out the newFrmMain.ShowDialog()...does your code execute the formLibrary.frmNewProject.Hide()
No. It stays visible and active.
Anonymous wrote:
Give the debugger a try as well
It appears to execute just like any other .Hide that is working properly. The debugger doesn't do much at that line. Is there something specific that I can look for?
Anonymous wrote:
where did you place the code to display the frmNewProject form? (formLibrary.frmNewProject.Show())?
In the form that is displayed prior to frmNewProject I have a btnClick with this:
Dim newFrmNewProject As New frmNewProject
formLibrary.frmOpenProject.Hide()
newFrmNewProject.ShowDialog()
Strange thing that I have noticed, after executing the btnClick to hide frmNewProject and show frmMain, I can close frmMain using the 'X' in the upper right hand corner (frmMain_Closed) but the application stays running and frmNewProject is once again active.
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Brad Fackrell wrote:
Dim newFrmNewProject As New frmNewProject formLibrary.frmOpenProject.Hide() newFrmNewProject.ShowDialog()
Does this code work in the form displayed prior to frmNewProject?? If that works, then you have a very strange situation as it is the exact same code when you are attempting to display your newFrmMain.
But...I think the problem is the following:
In your class code you have:
Public Class formLibrary<br />
Public Shared frmOpenProject As New Form<br />
Public Shared frmMain As Form<br />
Public Shared frmScoringJustification As New Form<br />
Public Shared frmProjectName As New Form<br />
Public Shared frmDatesAndLocation As New Form<br />
Public Shared frmPOC As New Form<br />
Public Shared frmArticulation As New Form<br />
Public Shared frmCollectorsAndNotes As New Form<br />
Public Shared frmComponents As New Form<br />
Public Shared frmPrint As New Form<br />
Public Shared frmNewProject As New Form<br />
End Class
Take note of the bold line in your class. Then in your btnClick event you placed:
Dim newFrmMain As New frmMain <br />
formLibrary.frmNewProject.Hide() <br />
newFrmMain.ShowDialog()
Again take note of the bold. Then in your previous form when you display your frmNewProject you had:
Dim newFrmNewProject As New frmNewProject formLibrary.frmOpenProject.Hide() <br />
newFrmNewProject.ShowDialog()
Now if I am correct, when you are attempting to hide your frmNewProject using this line of code (in your btnClick):
formLibrary.frmNewProject.Hide()
It is executing...BUT it is hiding the frmNewProject in your fromLibrary class...which hasn't actually been displayed to the user. Thus appearing to do abosulutely nothing.
How does that work? You are creating a new (local) instance of frmNewProject and then using the .ShowDialog to display it. So, you can test my theory by changing what you had in your previous code:
<br />
Dim newFrmNewProject As New frmNewProject<br />
formLibrary.frmOpenProject.Hide() <br />
newFrmNewProject.ShowDialog()
Try changing it to:
'Dim newFrmNewProject As New frmNewProject formLibrary.frmNewProject.ShowDialog()<br />
'newFrmNewProject.ShowDialog()
I know I jumped around alot...but the main idea is that in your code you are attempting to .Hide a form that hasn't actually been displayed to the user. This is because the formLibrary.frmNewProject and newFrmNewProject are two different instances.
I hope that makes sense?!?
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