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we have a design project wherein we have to make a visual basic program that is interfaced with the parallel port. what is the requirements or needed files for us to interface with the parallel port of a computer? what are the code for every pin on the parallel port.
i hope some one can help me with this. thanks a lot!
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thanks a lot sir dave! but i need the codes for the visual basic 6 or . net (but preferrably vb 6) and using the windows application. i hope that you could help me again. thanks again!
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All you need to do is search the net for "vb6 parelle port" and you'l come up with all kinds of tidbits on the subject. Try http://delabs.topcities.com/cirdir/data2.html[^]
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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HOW TO: Access Serial Ports and Parallel Ports by Using Microsoft Visual Basic .NET
http://support.microsoft.com/default.aspx?scid=kb;en-us;823179
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thanks a lot sir anonymous, but i need is the windows application of .net. we have a program that set the time when will a switch will be open or close through the output of the parallel port. i know that the parallel port's output is about 5 volts. that voltage is will be connected in a relay that is also connected to a female plug. i really appreciate the help that you gave to me. Thanks a lot guys!
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This will work is you wanted to read/write data to the port. But for a hardware "switch" application, you'd need I/O port-level access to the COM and LPT ports for it to work properly.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi again,
I have 2 grids on my form. One of then is populated from a dataset. On entering values in the second col of my first grid I want to do a for next loop of the first grid and display the total value in the second col of my second grid:
I have managed to populate the dataset for the first grid but have no clue how to use the for next to calculate the total.
Can some one help?
I can put the code here if you need.
Tnx
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This[^] little article on MSDN should give you the insight your looking for.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Search the web for "metro 272 file format equifax[^]" for more information. You may even have to contact Equifax or TRW for the specification.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi all,
I would like to have the tool tip text on a col of a datagrid. For eg if I run my mouse on the second col of my Datagrid I want to display 'Enter only Mr. or Mrs."
Is t his possible?
Tnx
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It is possible. I think you can find a good start on this near the bottom of Customizing the Windows Forms DataGrid[^] on MSDN. The technique is the same, but must be modified to work with columns instead of rows.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I have an application and i'm using a treeview as a sub menu. I read the required form name from a table in string format.
Now i want to load and display the form in vb.net.
I've tried iterating thru the forms collection, but that does not seem possible.
PLEASE I REALLY need some help
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There is no forms collection...
You have to create an instance of the form you want, like this:
Dim myForm As New Form2
myForm.Show()
But, since your using a string to represent the name of the form, you'll have to make a choice based on that name, then open the appropriate form.
Windows Forms in the .NET Framework don't work like the forms in previous version of Visual Basic. You might want to read Working with Multiple Forms in Visual Basic .NET: Upgrading to .NET[^] on MSDN first.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Thank you for your reply to my problem. But perhaps a bit of code in a hypathetical situation might describe my problem better.
'k Lets say i have an application with 2 forms "frmList", "frmDetails"
......... some code .........
Dim chrSelectedForm as String = "frmList"
Dim objSelectedForm as Form
objSelectedForm = new chrSelectedForm
objSelectedForm.Show()
............ or ..............
For each objSelectedForm in "MyApp.Form" - there'sno forms collection
if objSelectedForm.Name=chrSelectedForm
objSelectedForm.Show
End If
Next
--- end --------
I hope you can see from the above what i'm trying to achive.............. it's driving me nusts - i have a whole system thats been designed around this concenpt and will now not work..........
Please - HELP !!!!!!!
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How About something Like
Sub Openform(byVal p_formName as string )<br />
<br />
Select Case p_formName<br />
<br />
Case "frmList"<br />
Dim form As New frmList<br />
form.MdiParent = Me ' if you are using MDI container<br />
form.Show() 'or form.ShowDialog() <br />
Case "frmDetails"<br />
Dim form As New frmDetails<br />
form.MdiParent = Me<br />
form.Show()<br />
<br />
End Select<br />
<br />
End Sub<br />
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What mtone put up is, by far, the easiest solution. In order for your String version to work, you'll have to use Reflection in order to get the list of Form classes in your assembly. Not a problem for the faint of heart...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Please help me in finding out how to host a vb.net dll in ASP.net that is dependent on another vb.net dll???
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Dear Dave,
Thank you very much for the reply, actually i have a windows control library developed in vb.net.I'm hosting this dll in a aspx page using frameset. This frameset has two frames, the right one hosting the dll(which has a treeview control implemented in it). Now when I click on the node in this tree control, I want the link be provided in the left frame...Can you help me with this...Thank you
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Nope. Not that good with ASP.NET. You would probably have better luck posting this question, with alot more detail, in the ASP.NET Forum.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi all
I want to pass a event From outside of the form to the minimized form. e.g if i will click in the desktop i should able to get the location i clicked. or my mouse over event i have to get the postion of the cursor.
Can any one help me the way
Wating for respnse
Regards
Arun
Arun Kumar Sabat
Bangalore
India
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hi,
Arun, this may not be what you want. But i have a small doubt on this question. i am explaining my level best.
See, Events are user generated or systems generated. Events are used to notify the system that some actions is happend. Each and every windows based applications have their own message queque( event loging) that will keep the messages or events which is generated by the user. This event loging is maintained by operating system itself.
Here you want to pass an event which happend in one form(window) to another. That is you want to merge a perticular event(message) into another message context. So i don't think so that , it is possible to pass an event from one window to another window which doesn't have any logical relation. And one more thing i want to specify now. See if we can hadle this event's and event logging priority then we would have easily deside which window need to execute and which event need to triggers even though they have least priority in message queue.
So i don't think that it is possible to merge your event into some other windows message queue. Actually it is maintained by OS itself.
Sreejith Nair
[ My Articles ]
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Unfortunately, you won't get these "events" directly. Since your app doesn't have the focus when they happen, you'll never see them.
You'll have to implement an IMessageFilter and add it your applications message pump, using Application.AddMessageFilter. Once done, you'll be able to receive all message, like mouse click messages, before their dispatched to their destinations. But, be warned ... the code you write for this method will have to be very efficient otherwise you'll end up slowing the system down!
See RemoveMessageFilter[^] for a small example. There is also this[^] article here on CP.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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