Setting the Default Printer in .NET

The following C# code shows how to use WMI to query printers information, set and get default printer.
public bool SetDefaultPrinter()
    System.Management.ManagementObjectSearcher search = 
default(System.Management.ManagementObjectSearcher); System.Management.ManagementObjectCollection results =
default(System.Management.ManagementObjectCollection); System.Management.ManagementObject printer =
default(System.Management.ManagementObject); search =
new System.Management.ManagementObjectSearcher("select * from win32_printer"); results = search.Get(); //Get Default Printer System.Management.ManagementObject defaultPrinter = null; foreach (System.Management.ManagementObject foundPrinter in results) { System.Management.PropertyDataCollection
propertyDataCollection = foundPrinter.Properties; if ((bool)foundPrinter["Default"]) // DEFAULT PRINTER { System.Diagnostics.Debug.WriteLine(foundPrinter["Name"]); System.Diagnostics.Debug.WriteLine(foundPrinter["Location"]); } } //Sets new default Printer foreach (System.Management.ManagementObject foundPrinter in results) { System.Diagnostics.Debug.Print(foundPrinter["Name"].ToString()); if (foundPrinter["Name"].Equals("PDFCreator")) { System.Management.ManagementBaseObject outParams =
foundPrinter.InvokeMethod("SetDefaultPrinter", null, null); if (outParams == null) System.Diagnostics.Debug.WriteLine("Unable to set default printer"); Int32 retVal = (int)(uint)outParams.Properties["ReturnValue"].Value; if (retVal == 0) return true; else return false; } } return false; }

AutoCAD VBA Migration to VB.NET or C#

AutoCAD 2010 will not be supporting VBA.


“If you utilize VBA macros in your work environment, they will no longer work unless the VBA module is installed on your system. “
“When you run a command that requires VBA, a message dialog box will be displayed stating that VBA is no longer installed with AutoCAD and directing you to a website where you can download the VBA module. “

And also you can see that Autodesk states: “Autodesk is evaluating how long VBA will be supported in Autodesk products in the future. Though supported in the AutoCAD 2010-based products, it may or may not be supported in future releases. Therefore, it is strongly recommended that VB developers develop all new code using VB .NET.

VBA does not support 64bit systems in a native way.

But If you want some advice from the VB migration experts or help on your migration project from VBA to VB.NET or C# you can us contact Artinsoft Migration Services.

We build the VB Upgrade Wizard that shipped with Visual Studio and have been doing VB migrations for years.

ColdFusion 8 and JRockIt

15. June 2009 18:41 by Mrojas in General  //  Tags: , , , , , , ,   //   Comments (0)

JRockIt is an interesting Java Virtual Machine. I really admire the technology used in it. Well following Mike’s post about Memory Leaks in Coldfusion I was trying to configure the JRockit JVM to do some profiling on an important application.

But alas. Time just flies and things have change a lot since Mike wrote that post. So this is basically an update:

1) JRockit must be downloaded from: You must accept the license and also have an OTN Account (this is a free process). Download the right version for your platform. I tried the x86 version on my 64 bit server and it didn;t work, so use the version that fits better to your platform. However there is no 64 bit client version of Memory Leak and all the other nice client tools. But dont worry. Download both version 64 and 32 bits versions. You will use the 64 version for your server and the 32 bit version for monitoring.

2) Stop coldfusion server

3) Modify the jvm.config file. In my case it was in: C:\ColdFusion8\runtime\bin\jvm.config

comment out old java.home and add a new line like:
java.home=C:/Program Files/Java/jrmc-3.1.0-1.6.0/jre

In the java.args setting, remove parameter –Xbatch (dont know why, it just didnt work)

add a parameter like:

*In my case I also had to disable security in C:\Program files\Java\jrmc-3.1.0-1.6.0\jre\management\ with a line like:

4) Re start coldfusion

Migration to 64-bit: ODBC

5. December 2008 06:20 by Mrojas in General  //  Tags: , , , , , ,   //   Comments (0)

Most people migrating their application want to move ahead and take advantage of new technologies and new operating systems.

So if you had a VB6 application and you migrated it with us to .NET we will recommend and automate the process to use ADO.NET.


You can still use ODBC but i will list some compelling reasons:

* There a very fast ADO.NET drivers available. Using ODBC implies addind an interop overhead that can affect performance.
* Some vendors do not support and/or certify the use of ODBC drivers for .NET. So in those cases if you use ODBC your are on your own.
During my consulting experience I have seen several problems using ODBC drivers ranging from just poor performance, problems with some SQL statements, stored procedures calls, database specific features or complete system inestability.
* and also problems running in 64-bit.

This last one is very concerning. If you made all the effort to migrate an application to .NET and run it on for example on a Windows 2003 64 bit server it wont be able to use your 32-bit ODBC drivers unless you go to the the Build tab, and set Platform Target to "x86".

This is very sad because your application cannot take advantage of all the 64 bit resources.

If you are lucky enough you might find a 64 bit version of your ODBC driver but I will really recommend going straigth to 64-bit and use ADO.NET. And that's exactly what we can really help you to do specially in our version 2.2 of the VBUC.