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Just on a hunch, are you using the "default form instance" facility that VB.NET provides to help with upgrading VB6 apps? My guess is that there is some problem that is occurring the first time you use frmClientCommon1.
Did you do what the error message suggested and look at the InnerException? The inner exception should provide you with more useful information about what is going wrong.
Also, as a general tip, think about what is different between the dev environment and production environment. Different connection strings needed? Missing data files? Registry settings? Basically anything that might be set up differently.
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Hi,
Im looking for a good VB article that i need to use in a renewal automation for an insurance product. Found the hands on labs for windows workflow (VB.net) edition and half of its in C#, which isn't a problem but i have a tight deadline to follow.
Many thanks
Simon Whale
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You, more than liekly, won't find one for such a specific requirement. Your best bet is to learn from other examples and write your own. C# is easily convertible to VB.NET, so you've already got examples. If you were looking for copy'n'paste code, you will not find any.
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I'm not entirely sure what your question is here. If you are looking for a good introduction or overview of WF, then I would recommend the Ode To Code articles[^]. I found these very useful when I was trying to get my head around .NET WF. Again, the examples are C# but as someone else pointed out, it's not hard to translate it to VB.
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I am wanting to make a desktop application to go along with my website. The idea is to display all media mainly movie files in the desktop application and be able to stream them. I will be using a MYSQL database and a login system which I have already setup.
Could anyone help me on how I would go about displaying and streaming media content. For example how adobe media player does it but of course on a much smaller scale.
Snippet codes or ways of doing it would be great please. If you give me snippet codes, just display the main points, then i can build on it. 
Thank you for any help received,
Robbie.
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You may also want to look into Window Media Encoder[^] (free!)
The Flash Video Encoder and Flash Media Server, as far as I know, only come in Flash Professional, which can be found in Adobes CS4 products: Web Standard, Production Premium, Design Premium, Web Premium and Master Collection. None of these are free.
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Thank you both, ill take a look into the links you have posted
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Hello to All,
Actually i have a dll who is build by vb6. And Now i want to use it in vb.net.
When i am try to add its as a refrence it generate error of not a valid com dll.
so please help me how to use it.
ThanksIf you can think then I Can.
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You can use VB6 DLL's in .Net, but you have to ensure it is public class and public methods, as it is these that VB.net will call.
Is it on the same machine or across a network?------------------------------------
I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave
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It is an Extension DLL or a Regular Dll , if an extension dll then it can be used for the Same language in which it is written  Best Regards,
SOFTDEV
If you have knowledge, let others light their candles at it
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S0FTDEV wrote: It is an Extension DLL or a Regular Dll , if an extension dll then it can be used for the Same language in which it is written
I believe my English is pretty good (being English n' all) but I cannot for the life of me work out what you are trying to say in your statment.Steve Jowett
-------------------------
Real programmers don't comment their code. If it was hard to write, it should be hard to read.
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its simple buddy , i am asking weather that Dll is a regular DLL or an Extension , no science Man  Best Regards,
SOFTDEV
If you have knowledge, let others light their candles at it
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What exactly is a "regular" Dll? And what is a "Extension" Dll? Please explain, this wording is strange to me.
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Considering the original question (VB6.DLL) I would not think he was able to build an "extension" dll. and also not an "regular" dll. There is an codeproject article (I my memory is ok) about creating non-ActiveX Dlls with Vb6, but I would guess he talked about an ActiveX Dll. Nothing with your C++ stuff ...
And, in fact, I used VB6.DLL with C# and it works great.
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VB6 can only build COM-based .DLL files (ActiveX). It cannot build a library, or extension, or anything else for that matter.
Well, that's mostly true anyway. You can coerce a library .DLL out of VB6, but you have to hack it together.
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Have a look at COM Interop.Me, I'm dishonest. And a dishonest man you can always trust to be dishonest.
Honestly. It's the honest ones you want to watch out for...
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I have a splitbutton toolbar control that doesn't seem to work right.
The BackColor property can be set and read, but doesn't show up on the control itself. I have an image with transparency, and no matter which way I change the backcolor (programmatically or in the properties), it uses the regular control color. I even checked the designer code, and the color is there.
Anyway, I'm trying to implement the last chosen color for font and hiliting (the way Word/Wordpad does for their controls. Thought I'd try the background color first. Does anyone know of any code to alter a portion of the image itself?
I know there's the wordpad sample, but it's a variety of C. Maybe I can convert it (if I can find it)modified on Saturday, March 13, 2010 5:09 PM
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Figured out how to alter an existing image. Pretty simple really.
This colors the last 4 lines of the image itself. This of course only works for a 16 x 16 image, but can easily be changed for different placement and image size.
Since I have 2 controls in 3 different places, I just do:
instance.Image = ColorImage(instance.Image, newColor)
Private Function ColorImage(ByRef theImage As System.Drawing.Bitmap, _
ByRef theColor As System.Drawing.Color) _
As System.Drawing.Bitmap
Dim x, y As Integer
For y = 12 To 15
For x = 0 To 15
theImage.SetPixel(x, y, theColor)
Next
Next
ColorImage = theImage
End Function
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I have done alot of profiling and much reworking to my application but it is still too slow.
The place that seems to be the problem now is in InializeComponent().
The form is rather large with MANY controls but they are all needed because of the organization of the app.
Any suggestions are very welcome thank you.Humble Programmer
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InitializeComponent is generated by Visual Designer, so you can't really change it directly.
AFAIK Designer takes care of suspending and resuming layout when appropriate.
You can keep it fast by:
- not having dozens of Controls; you should not show 100 Controls all at once to the poor user, and you should not create, add, populate, Controls that aren't directly visible (e.g. on other tab pages);
- not adding data immediately upon Form creation; i.e. not populating Controls that need a lot of information such as ListBox, ComboBox, TreeView, PictureBox; you could postpone that till the Form is shown, and even then a background thread might be helping out (beware illegal cross-thread operations).
- not having a background image;
- not playing with transparency.
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Just FYI I inherited this code...
These are all class level variables...
They are used in many different ways throughout the class.
The reason it was done this way is obvious he wanted to be able to keep the forms so that he could check if they were loaded before reloading them.
My question is, is there a way that I can keep these available to all mentioned code without the huge performance hit when creating this class?
Private lClientNumber As Long ' the uniquenumber that was passed from the calling program
' ' This is the ClientNumber.
Private tPassedMode As String ' mode we are in "ADD", "EDIT", "VIEW"
'
Private bInquireOnly As Boolean
Private bDataChanged As Boolean
Private bFieldChanged As Boolean
Private bExistingRecord As Boolean
Private myCommand As New MySqlCommand
Private tVarArray(100, 3) As String
'
Private lStateNum() As Long
Private lSCNumber() As Long
Private lRaceNumber() As Long
Private lLanguageNumber() As Long
Private lLegalStatusNumber() As Long
Private lMaritalStatusNumber() As Long
Private lGender() As Long
Private lCountyOfResidence() As Long
'
Private ClientDatesAnnuals As frmClientDatesAnnuals = frmClientDatesAnnuals
Private ClientContacts As frmClientContacts = frmClientContacts
Private ClientPickups As frmClientPickups = frmClientPickups
Private ClientDatesIPPIFSP As frmClientDatesIPPIFSP = frmClientDatesIPPIFSP
Private ClientDatesPsyc As frmClientDatesPsyc = frmClientDatesPsyc
Private ClientDayHab As frmClientDayHab = frmClientDayHab
Private ClientDietary As frmClientDietary = frmClientDietary
Private ClientExtendedCare As frmClientExtCare = frmClientExtCare
Private ClientFileStorage As frmClientFileStorage = frmClientFileStorage
Private ClientFinancialScreen As frmClientFinancialScreen = frmClientFinancialScreen
Private ClientFirstConnection As frmClientFrstConn = frmClientFrstConn
Private ClientHearScreen As frmClientHearingScreening = frmClientHearingScreening
Private ClientIdentification As frmClientIdentification = frmClientIdentification
Private ClientIndividualCounseling As frmClientIndivCounsel = frmClientIndivCounsel
Private ClientImmunizations As frmClientImmunizations = frmClientImmunizations
Private ClientMedical As frmClientMedical = frmClientMedical
Private Notes As sha_frmNotes = sha_frmNotes
Private ClientPublicSchool As frmClientPublicSchool = frmClientPublicSchool
Private ClientTherapyOT As frmClientTherapyOT = frmClientTherapyOT
Private ClientTherapyST As frmClientTherapyST = frmClientTherapyST
Private ClientTherapyPT As frmClientTherapyPT = frmClientTherapyPT
Private ClientTransportation As frmClientTransportation = frmClientTransportation
Private ClientVisionScreen As frmClientVisionScreening = frmClientVisionScreening
Private ClientConsentToInvite As New frmClientConsentToInvite
Private RefDates As frmRefDates = frmRefDates
Private RefDetails As frmRefDetails = frmRefDetails
Private RefEvals As frmRefEvals = frmRefEvals
Humble Programmer
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| Also so that he can check if there is saved data on the other forms when they close the main form . Humble Programmer
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I see a lot of form referencing variables. You did not specify where that code resides, but having a "Private" attribute they must be class members. Furthermore (I'm no VB.NET expert) I'm afraid
x As frmX=frmX calls the frmX constructor, so all these forms get instantiated right away, as soon as the containing class is being instantiated. That is horrible as it delays everything, and probably isn't needed at all, the app probably is never going to need ALL those forms, and certainly not right away.
What needs to be done is organize lazy instantiation. The easiest way to do that is by using properties. Something like (not tested):
Private hiddenX as frmX
Property X as frmX
If hiddenX isNothing
hiddenX=new frmX
Endif
Return hiddenX
End Property
That way, the remainder of the code can reference X as before, however the form will be instantiated only the first time X gets referenced. From then on, X behaves as before, remains alive (in hiddenX), etc.
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