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Curious...
When you created your component library, did you just enble the "Register for COM Interop" checkbox in your project properties?
Did you attribute your class with the ComClass attribute? Like this:
<ComClass(TestClass.ClassId, TestClass.InterfaceId, TestClass.EventsId)> _
Public Class TestClass
' These GUIDs provide the COM identity for this class
' and its COM interfaces. If you change them, existing
' clients will no longer be able to access the class.
Public Const ClassId As String = "38605A8E-9541-4E06-8E7E-6E07A4D67B8F"
Public Const InterfaceId As String = "22719D76-0322-4EC0-A100-95246F0F866E"
Public Const EventsId As String = "1AECF045-F034-4C92-9A62-83C56072E56C"
Public Sub New()
MyBase.New()
End Sub
Public Sub ShowMe()
MsgBox("This is the component!!!!!!")
End Sub
End Class
If not, this is probably why your component doesn't work every time you change something.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Thank you first, I always see this ID in VS2003,
Does this ID generated by VS randomly?
Can I just copy this ID for my COM use?
Thank you again!
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You COULD use it, but I would recommend you generate your own GUIDs.
Each class must have it's own unique GUID.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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You can learn more about this here[^].
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I have try your advise.
There is a bit difference at all,
That is, When I using the class in VBA,
there is a list of public function in that class for me to choose.
This is no before adding the IDs.
However, The problem is still here.
Error after rebuild the COM.
Further information,
In my Class Library project, I have three classes and one window form.
In my test case in VBA, I have just using one class, and so I just adding the IDs to that class.
any other advise?
anyway, Thank you so much again!
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cylix2000 wrote: Error after rebuild the COM.
And that would be???
cylix2000 wrote: In my Class Library project, I have three classes and one window form.
In my test case in VBA, I have just using one class, and so I just adding the IDs to that class.
any other advise?
You need to add different GUIDs to each class you want visible to COM. No two classes can have the same GUID.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I have tried to make all these class with distinct IDs,
but the error still ...
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And that error is??
I have no clue what's wrong, other than possibly you have multiple versions of your component registered, but only one file that is valid. You could have an old version of the component still registered with the same name, but different GUIDs. You might have to go through the registry and track down every key that mentions your component and delete them from the registry. If you don't know what your doing with this part, DO NOT EVEN ATTEMPT to do this. Just change the GUIDs your using and the names of the library and classes in your component.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I am using VS 2003. I have different options to be given for each item in the data grid. One option is I can provide Boolean column which will give me check box in each optional column and validate those column. Now can any body suggest me is there any method to provide Radio button instead of Check box in the grid.
-Krishnaraj
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http://www.codeproject.com/dotnet/PrintingFormReport.asp[^]
Now I can print the form but I still have some queston, plz help!!!
Q1 If I have more than one record, how to print multi record?
Q2 If the form is too big, how to scale it in A4 width?
Q3 how to print all the lines in datagrid?
Q4 the richtextbox can not be printed, how to fix it?
By the way , if there is other method to print it like this and solve my problem, I am willing to use. Thanks!!!
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I have the following in vCpp:
int DVP1412_CreateSDKInstence(void **pp)
this is a method in a dll, DVP1412.dll that comes with Advantech capture card.
How would I delcare this in VB.NET? What does void **p represent?
thanks
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Any programs that can read methods in a dll and create the declaraction for a language such as VB.NET?
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www.pinvoke.net is a good reference for win32 calls. It may or may not list your capture card's dll, but you will get some pointers about **p (which I think is a pointer)
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"int DVP1412_CreateSDKInstence(void **pp)"
it's a "pointer to a pointer"
Theoreticaly it should come out looking something along the lines of this:
<DllImport ("DVP1412.dll", SetLastError:=True)> _
Public Shared Function DVP1412_CreateSDKInstence(ByRef pp as IntPtr) as Integer
End Function
Dim pp as IntPtr = Intptr.Zero
Dim Ret as integer = DVP1412_CreateSDKInstence(pp)
Debug.writeline("DVP1412_CreateSDKInstence: " & Err.LastDllError())
But I don't have the SDK or anymore of the code,
progload
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When i use Dataadapter to fill datatable, if the data amount is huge, the user has to wait for a long time, so maybe they want to cancel that operation, how to do that ?
SqldataAdapter.fill(mydataset.mydatatable)
how to stop this operation
I am Entry level person
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You can't. Since this code is most probably executing on the UI thread, you'll notice it's a blocking call and won't return execution to the next line until this query finishes. If you can't execute any code on that thread, there's no way you can click on a button, let alone make this call stop.
The only way to "stop" this call is to run the query on a background thread, freeing the UI thread to do other things. To cancel this query, all you have to do is ignore the return from the query thread. Threading is by no means an entry-level thing to put together.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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i used mydataAdapter.selectcommand.cancel to cancel that operation. it returns a error which is cancelbyuser sqlexeption
I am Entry level person
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SqlCommand.Cancel[^] docs with an example.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Need help on how to clear the flexgrid format... using codes...
thanks
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Has anyone used these functions within VB.NET? I've seen several C++ samples and one VB6 but could not convert any of them to VB.NET.
Any expert advise is appreciated.
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meraydin,
See:
http://www.rallenhome.com/books/managingenterprisead/code.html[^]
Under chapter 12. Security
Extra_Retrieve_All_Kerb_Tkts.vbp.txt
Extra_Retrieve_All_Kerb_Tkts.vbw.txt
Extra_Retrieve_All_Kerb_Tkts_form.frm.txt
Extra_Retrieve_All_Kerb_Tkts_form.frx
Extra_Retrieve_All_Kerb_Tkts_Module.bas.txt
Most of this code can be converted to VB.net Easily
You can download the code in a link on the page in
a zip file.
If you need help with converting it, post the code
your having trouble with, or send me an email and
I will try to give you a hand. I don't have time to
convert it all for you.
Or if you have code in vb already, post where your
having trouble and I'll try to help you with it.
progload
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Whats the best way or tool to prevent decompilation of vb6
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VB6 compiles to native code with a statically linked library, called the VB6 Runtime.
You can't stop anyone from reverse engineering the code. It's not pretty nor easy, but it can be done.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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What about obfuscating software, does it make the process of reverse engineering any more difficult.
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In VB6, there's nothing to obfuscate! It's native processor code, which you really can't modify to make things difficult. There's no metadata like there is in a .NET managed code application.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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