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Hi,
Does anyone know how to use visual basic to transfer 8 bts of data (1 stop bit) with standard frame. It will be use to control the motor speed. Please let me know if you know how to do it. Thank you very much for your help
Regards,
Nina
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You might want to specifiy upon WHICH INTERFACE you are transfering this lonely byte. Without knowing this vital piece of information, it's impossible to answer your question.
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Hi Dave,
The data is to be sent through a serial port, COM1.
Can you show us how to send and receive data using MS_Comm?
We are using VB6.
[Continued from Nina's Question]
Paul
-- modified at 21:37 Saturday 1st September, 2007
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In a previous program, I was able to open Excel and have it running in the background. Now I use the same (similar except the names) code in a different program and get the error message " 'New' cannot be used on an interface".
Private Sub Admin_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load<br />
xlsApp = New Excel.Application<br />
xlsApp.Visible = False
Previously in the original tuition program, there was no objection to the code:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load<br />
xlsApp = New Excel.Application<br />
xlsApp.Visible = False
What am I not switching on?
Please someone help?
Frank
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hi frank
have you check to include the references of Microsoft.office.interop services
i also use this type of code but that's little bit different but that's work
i think your error is concerned with some thing else not with "new".
i use
Dim newexl As New Microsoft.Office.Interop.Excel.Application<br />
Dim workbookexl As Microsoft.Office.Interop.Excel.Workbook = newexl.Workbooks.Add()<br />
Dim sheetexl As Microsoft.Office.Interop.Excel.Worksheet = workbookexl.Sheets(1)
this try this out.
help everyone
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Hi, I tried...
Dim newexl As New Microsoft.Office.Interop.Excel.Application<br />
Dim workbookexl As Microsoft.Office.Interop.Excel.Workbook = newexl.Workbooks.Add()<br />
Dim sheetexl As Microsoft.Office.Interop.Excel.Worksheet = workbookexl.Sheets(1)
And it is underlining the Microsoft.Office.Interop.Excel.Application
and saying "Type 'New Microsoft.Office.Interop.Excel.Application' is not defined"
I still feel that something isn't plugging right, but do know for sure what. Maybe cause I cut and pasted some references in as they didn't appear available from the 3 tabbed drop downs in Project/Add Reference.
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Hi, I need help to change the primary SMTP proxy address of some users.
My users are in OU="user"
The proxyaddress of them are the following
SMTP: user1@test1.local
smtp: user1@test2.local
I need a script that change it in the active directory.
At the end of the script the proxyaddress of the user must be:
smtp: user1@test1.local
SMTP: user1@test2.local
Please, help me ...
Thanks
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I am trying to fill a dataset and update a dataset to change values in a database. I have a third party program entering records in mydatabase. My program fills a dataset. I do some processes and update the dataset to update the mydatabase. All works well, until I factor in the fact that I want to watch the database and update a field when a record has a certain value so, I watch to see if any changes and Onchanged is called then I test the varables and if the record has a certain value I want to change a different value. But, then the Onchanged event is called again and I am in a endless loop of calling the method, changing the variable, calling the method, changing the variable. What would you suggest?
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That won't work on an Access database.
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There's no reliable way to do this in Access. Access doesn't support triggers, so your kind of screwed.
You could use the FileSystemWatcher, but there's a problem with this. In order to get this to work, your Changed event would have to set a flag when it see's a change made and need to make its own change. This flag would tell the Changed event that it should ignore the event when it gets called again and then reset the flag.
Private Sub ChangeEvent(blah, blah) Handles ....
Static updatingDatabase As Boolean = False
' A change to the database has been detected.
' Check the flag to see if WE made the change, or if an outside
' source made the change.
If updatingDatabase Then
' We're making the change. Reset the flag
' and do nothing.
updatingDatabase = False
Else
' An outside source made the change.
' Set the flag and make our changes to the database.
updatingDatabase = True
' Do you database update here.
End If
End Sub
Now, there is a large problem with this. If the outside source makes a change to the database while this code is running, you can't tell the different between your code making the change and the outside source making the change. It's entirely possible that the outside source changes the database and your code will never see it.
There is simply no way to do this reliably in Access. SQL Server, even the FREE Express Edition, support Triggers, that will easily allow you to do this in the SQL code of your database.
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I have been seeing the following code I do not know what the characters mean
in a web page
<%$ Tranlate: any string value %>
I know that translate is a function in the code and it is translateing the any string value to another string but could you tell me what the $ means how is it different then <%# and what the : does
In some code I also find
NewRow!somefield = somevalue
what does the ! mean and what does it do
Thanks
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I don't know about the first one, but "!" when late-bonding is the same as "." when early-bonding.
<code>
Dim FSO
FSO = CreateObject("Scripting.FileSystemObject")
' This line of code is unknown to compiler:
Call MsgBox (FSO.DriveExists("D:"))
' So use this instead:
Call MsgBox (FSO!DriveExists("D:"))
</code>
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Hello all,
I was wondering if anybody could provide me with an example on how to iniatiate a IRC Session, and keep it alive, in VB.Net.
I understand parsing messages, but I cannot think of any ways to respond to the Ping Pong system.
Many thanks, Fahad Sadah
All of my programs are downloadable at fahadsadah.co.nr I hate site errors =]
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Do what any of us are going to do. Google for "VB.NET IRC Client".
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In VB 6.0:
I create a simple OCX, i want to raise some event when the user control initialize.
But the program does not runs correct. why?
following is my program:
In UserControl1.ctl:
Public Event InitControl()
Private Sub UserControl_Initialize()
RaiseEvent InitControl
End Sub
In Form1.frm
Private Sub UserControl11_InitControl()
MsgBox "UserControl Init"
End Sub
Why the messagebox can not be shown when i start my program? thanks~~~~~~~~~~~
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I have a dataGrid that is populated by SQL table. The Datagrid has two dynamic columns - that I created to for calculations. I want to sort the grid on frmload by one of the dynamic columns is that possible - if so; what will be the best way to do this?
Thank You
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hi
Use Orderby in your SQl statement.
Vuyiswa Maseko,
Sorrow is Better than Laughter, it may Sudden your Face, but It sharpens your Understanding
VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
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How will I do that? - this is my code below - the Sql statement will order by a column in the table - in my situation I have a column that is not part of the table it was created dynamically - below is my code
Dim command1 As New SqlCommand("Select * FROM LateOrders_query_view order by requested_date desc", cnn1)
Dim SqlReader As SqlDataReader
cnn1.Open()<br />
<br />
Dim dt As New DataTable("LateOrders_query_view")<br />
Dim DirAdapter As New SqlDataAdapter(command1)<br />
DirAdapter.Fill(MyDataSet, "LateOrders_query_view")<br />
<br />
dgOrderReport.DataSource = MyDataSet.Tables("LateOrders_query_view").DefaultView<br />
<br />
'Create Dynamic Columns call related function<br />
Dim dc As DataColumn<br />
dc = New DataColumn("Days Open") ', Type.GetType("System.double"))<br />
MyDataSet.Tables(0).Columns.Add(dc)<br />
fncGetOpenDays()<br />
<br />
Dim dc2 As DataColumn<br />
dc2 = New DataColumn("Days Late")<br />
MyDataSet.Tables(0).Columns.Add(dc2)<br />
fncGetDays()
Is there away for me to sort by a dynamic column (the dynamic column is not part of my table in the database)
Thank You
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I figured how to make it sort - its pretty simple here is the code
Dim dc2 As DataColumn<br />
dc2 = New DataColumn("Days Late")<br />
With dc2<br />
.AutoIncrement = True<br />
.AutoIncrementSeed = 1<br />
.AutoIncrementStep = 1<br />
End With
Now I just need to get it to do this on load not when I click on that column...
Help will be appreciated. Thanks
Thank You
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hi KA National Marker
am sorry i could not reply, it was friday, i dont access the net on weekends. i do that when am at my workplace. am glad you find your answer.
i know you are smart after all
Vuyiswa Maseko,
Sorrow is Better than Laughter, it may Sudden your Face, but It sharpens your Understanding
VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
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Hello!
I have two rich text boxes RTB1 and RTB2.
I have text with different fonts,colors and styles in RTB1 and RTB2 is empty.
when i use this code:
RTB2.text = RTB1.text
RTB2 displays the text but with its default font and color.
How can i keep the fonts and styles used in source text box to the destination textbox.
Thanks for Any help!
colgateas900197
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use the copy and paste methodes:
RichTextBox1.SelectAll()
RichTextBox1.Copy()
RichTextBox1.DeselectAll()
RichTextBox2.Paste()
tested it with bold text and works
hope this helps
If my help was helpfull let me know, if not let me know why.
The only way we learn is by making mistaks.
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