Calling a VB Com component from Java

Hi,
I wish to call some legacy VB 6 COM dlls from some new Java code I am writing. I was looking (just read quickly haven't tried the examples yet) at the ActiveX Bridge documentation and get the impression that it only goes one way -i.e. make Java into an ActiveX Component to be used from VB, whereas I wish to call VB from Java.
Have I missed something or is this not the way to go to get to the legacy code?
The legacy code also has an MIDL file. Ideally, I would love to just be able to access that from Java, but I can't find any (non-Microsoft VJ++ based) tools to help with either converting MIDL to IDL so I can use Sun's idlj.exe or just converting the MIDL to Java.
Any pointers/tips on any of this would be appreciated.
Thanks,
Cheryl

I looked at Jacob, but didn't get far either.
Right now I'm looking at Jawin -
http://jawinproject.sourceforge.net/jawin.html. Not
making a lot of headway yet.
IDL is OMG's IDL (Interface Definition Language) -
http://www.omg.org/gettingstarted/omg_idl.htm.
MIDL is Microsoft's version of IDL for COM - I believe
it uses IDL., but can't seem to find a conversion
tool.
idlj.exe is in the bin directory of whatever JDK you
have loaded. This tool will convert OMG IDL into Java.
Good luck to you.Hi,
I am facing a similar problem. I need to access a vb dll methods. I took and look at jawin and installed it.
I want to invoke a method in the dll from my servlet.
So do I have to create stubs for it. I opened the Type Browser that comes with jawin. It is a GUI through which I am supposed to create stub java files for that dll. But I am getting this error:
[EXCEPTION] InfoPanel.generateInfo() failed to generated info
org.jawin.browser.xsl.TransformationException: TransformationManager.cacheStyles
heet() failed to compile stylesheet from: stylesheets/info/library.xsl - javax.x
ml.transform.TransformerConfigurationException: javax.xml.transform.TransformerC
onfigurationException: javax.xml.transform.TransformerException: java.net.Malfor
medURLException: no protocol: stylesheets/info/library.xsl
at org.jawin.browser.xsl.TransformationManager.cacheStylesheet(Transform
ationManager.java:130)
at org.jawin.browser.xsl.TransformationManager.checkStylesheet(Transform
ationManager.java:180)
at org.jawin.browser.xsl.TransformationManager.transform(TransformationM
anager.java:147)
at org.jawin.browser.info.InfoPanel.generateInfo(InfoPanel.java:68)
at org.jawin.browser.info.InfoPanel.selectionChanged(InfoPanel.java:61)
at org.jawin.browser.tree.TypeDataTree.fireSelectionChanged(TypeDataTree
.java:61)
Is anyone sucessfully able to generate stub files for the dll in jawin using Type Browser ?
Please let me know
my mailid is tanveerrameez(at) yahoo dot com
thanks
Tanveer

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RDLC Reports with Custom Font - Error HRESULT E_FAIL has been returned from a call to a COM component.

Hi,
I got an ASP.NET MVC (Razor View Engine and C#) application running on a Windows Azure Web Role.
I use RDLC local reports to create pdf files with printable price tags with respective barcodes.
I got it working on Azure after installing the barcode font (TrueType) using a start-up task. Recently, it stopped working without me changing anything related to this functionality.
I'm getting the following error and so far I didn't find any solution. I know the problem is the barcode font because the pdf is generated well with a standard font like Arial. Also, it works perfectly with barcodes when running the app
locally on my computer.
Error HRESULT E_FAIL has been returned from a call to a COM component.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Runtime.InteropServices.COMException: Error HRESULT E_FAIL has been returned from a call to a COM component.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
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System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo) +0
Microsoft.ReportingServices.Rendering.RichText.TextRun.ShapeAndPlace(Win32DCSafeHandle hdc, FontCache fontCache) +1450
Microsoft.ReportingServices.Rendering.RichText.TextRun.GetWidth(Win32DCSafeHandle hdc, FontCache fontCache, Boolean isAtLineEnd) +30
Microsoft.ReportingServices.Rendering.RichText.LineBreaker.GetLine(Paragraph paragraph, TextLine line, Win32DCSafeHandle hdc, FontCache fontCache, FlowContext flowContext, Single left, Single right, Single height, Stack`1 lineRunsIndex, Stack`1 lineRunsCharIndex, Int32 lineIndents) +266
Microsoft.ReportingServices.Rendering.RichText.LineBreaker.FlowParagraph(Paragraph paragraph, Directions direction, Win32DCSafeHandle hdc, Single dpiX, FontCache fontCache, FlowContext flowContext, Boolean keepLines, SizeF flowContextSize, Int32& contentOffset) +768
Microsoft.ReportingServices.Rendering.RichText.LineBreaker.Flow(TextBox textBox, Win32DCSafeHandle hdc, Single dpiX, FontCache fontCache, FlowContext flowContext, Boolean keepLines, Single& height) +617
Microsoft.ReportingServices.Rendering.RichText.LineBreaker.Flow(TextBox textBox, Graphics g, FontCache fontCache, FlowContext flowContext, Boolean keepLines, Single& height) +182
Microsoft.ReportingServices.Rendering.RichText.TextBox.MeasureFullHeight(TextBox textBox, Graphics g, FontCache fontCache, FlowContext flowContext, Single& contentHeight) +759
Microsoft.ReportingServices.Rendering.HPBProcessing.TextBox.CalculateVerticalSize(PageContext pageContext) +467
Microsoft.ReportingServices.Rendering.HPBProcessing.TextBox.DetermineVerticalSize(PageContext pageContext, Double topInParentSystem, Double bottomInParentSystem, List`1 ancestors, Boolean& anyAncestorHasKT, Boolean hasUnpinnedAncestors) +35
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Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.CreateVertically(PageContext pageContext, CreateItemsContext createItems, Double startInTablix, Double endInTablix, Double topInParentSystem) +374
Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.DetermineVerticalSize(PageContext pageContext, Double topInParentSystem, Double bottomInParentSystem, List`1 ancestors, Boolean& anyAncestorHasKT, Boolean hasUnpinnedAncestors) +662
Microsoft.ReportingServices.Rendering.HPBProcessing.PageItem.CalculateVertical(PageContext pageContext, Double topInParentSystem, Double bottomInParentSystem, PageItem[] siblings, List`1 ancestors, Boolean& anyAncestorHasKT, Boolean hasUnpinnedAncestors, Nullable`1 sourceWidth) +977
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Microsoft.ReportingServices.Rendering.HPBProcessing.PageItemContainer.DetermineVerticalSize(PageContext pageContext, Double topInParentSystem, Double bottomInParentSystem, List`1 ancestors, Boolean& anyAncestorHasKT, Boolean hasUnpinnedAncestors) +281
Microsoft.ReportingServices.Rendering.HPBProcessing.PageItem.CalculateVertical(PageContext pageContext, Double topInParentSystem, Double bottomInParentSystem, PageItem[] siblings, List`1 ancestors, Boolean& anyAncestorHasKT, Boolean hasUnpinnedAncestors, Nullable`1 sourceWidth) +977
Microsoft.ReportingServices.Rendering.HPBProcessing.ReportSection.NextPage(RPLWriter rplWriter, Int32 pageNumber, Int32 totalPages, Double top, Double availableHeight, ReportSection nextSection, Boolean isFirstSectionOnPage) +1382
Microsoft.ReportingServices.Rendering.HPBProcessing.Report.NextPage(RPLWriter rplWriter, Int32 totalPages) +384
Microsoft.ReportingServices.Rendering.HPBProcessing.HPBProcessing.GetNextPage(RPLReport& rplReport) +437
Microsoft.ReportingServices.Rendering.ImageRenderer.PDFRenderer.Render(Report report, NameValueCollection deviceInfo, Hashtable renderProperties, CreateAndRegisterStream createAndRegisterStream) +1021
Microsoft.ReportingServices.Rendering.ImageRenderer.RendererBase.Render(Report report, NameValueCollection reportServerParameters, NameValueCollection deviceInfo, NameValueCollection clientCapabilities, Hashtable& renderProperties, CreateAndRegisterStream createAndRegisterStream) +93
My source code:
LocalReport report = new LocalReport();
// Rdlc file path
report.ReportPath = Server.MapPath("~/Reports/PriceTags.rdlc");
// Data source
report.DataSources.Add(new ReportDataSource("productsDataSet", dataset1));
// Some parameters
ReportParameterCollection reportParameters = new ReportParameterCollection();
reportParameters.Add(new ReportParameter("currency", "EUR"));
reportParameters.Add(new ReportParameter("precision", 2));
report.SetParameters(reportParameters);
// FileContentResult GenPdf(LocalReport report, string filename)
return GenPdf(report, "Price Tags");
Any help on this issue would be welcome and sorry for any grammar mistakes.
Thanks in advance.
Vitor Pinto

Hi Vitor,
Thanks for your posting!
It seems that the error may have more than one possibilities. I recommend you could try to use the Azure remote debugger to debug your cloud service project on Azure instance. Please see this tutorials:
http://blogs.msdn.com/b/cie/archive/2014/01/24/windows-azure-remote-debugging.aspx
You could debug your code using the cloud service URL.
And you could enable the Diagnostics feature for collecting Logging Data by Using Azure Diagnostics (http://msdn.microsoft.com/library/gg433048.aspx).
Regards,
Will
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