Add compression to any Web or Windows application. Includes self-extraction and AES encryption.
Q: How do I deploy Excel spreadsheets that use PowerTCP ActiveX controls?
A: Unfortunately, there is no consistent model for 3rd party component support across Office products and versions. The recommended usage in Excel is to use the product as a reference rather than inserting it as a control. Also, if the spreadsheet ever had a PowerTCP control inserted at any previous time, that data was cached by Excel and a new spreadsheet will be required. When deploying to users, please refer to "Distribution under Internet Information Server" in the documentation for instructions as the technique is the same.
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Q: I have a web page that embeds your ActiveX control that works on my development machine. On another machine, a red 'X' appears or the controls shows the Trial Message.
A: The problem is that a runtime license needs to be provided for the control. Resolution: Get LPK_TOOL.EXE from Microsoft. You can find it in their Cabinet Development kit. It is also on one of the CDs that comes with Visual Studio. Use the LPK_TOOL to create an .lpk file for YOUR control. We can't stress YOUR control enough. In other words, let's say that you have a control called MyControl that contains several Dart controls. When choosing the control in the LPK_TOOL listbox, choose MyControl, NOT the Dart Controls. Again, we can't stress this part enough as it is ALWAYS the part that is missed. Add the following to your document BEFORE any other objects are declared. Make sure LPKNAME.LPK is the name of YOUR lpk: <OBJECT CLASSID=clsid:5220cb21-c88d-11cf-b347-00aa00a28331> <PARAM NAME='LPKPath' VALUE='LPKNAME.LPK'>
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Q: I want to use your control in a non-VB environment (e.g. Sybase or Borland) AND create it dynamically. It works on my development machine, but elsewhere it throws a license error.
A: PowerTCP uses what is known as ClassFactory2 licensing. This is a system developed by Microsoft as part of the COM architecture. All of the major development environments that we use support this type of licensing when a control is placed on a form, however, only VB or VBA type environments support it when the control is 'created' without a form. By created, this means Dimming as New, not CreateObject. Of the other environments, we currently only provide direct support only for dynamic usage in Visual C++. See the component wrappers for the code needed to instantiate an object with a license. ( Example: ITcp.h and ITcp.cpp included with the sample projects ) If you absolutely HAVE to use our products in a project without a form, you will need to get direction from the company that makes the environment ( Example: Borland, Sybase ) on how to use COM objects that require ClassFactory2 licensing.  Support for these environments is currently unavailable through Dart.
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Q: In Powerbuilder, the hourglass cursor does not persist when the Dart control is busy. How can I keep the hourglass?
A: Unlike other environments, the interface is automatically disabled when the cursor changes to an hourglass in Powerbuilder.

Including the code below will allow the hourglass to persist, but it will not automatically disable the interface. To produce the usual hourglass behavior, the interface must be explicitely disabled and enabled by the user.

//In the external global function declarations
FUNCTION ulong SetCapture(ulong a) LIBRARY "user32.dll"
FUNCTION boolean ReleaseCapture()
LIBRARY "user32.dll"

//In the script
ulong ll_handle, ll_rc
ll_handle = Handle(this)
ll_rc = SetCapture(ll_handle)

//after done

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Q: Is the free trial a 'full version'?
A: Yes. Your trial download is identical to the purchased product. The only difference is the trial download will only work for 30 days (in the case of ActiveX products) or will work for 7 days between each rebuild (for .NET products).
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Q: Is this product interoperable with the .NET framework?

Although the product may work with the .NET framework, it is not recommended no supported by our technical staff. PowerTCP for ActiveX products were not made to be used with the .NET framework and some features or versions of the framework may be incompatible. We do offer a line of PowerTCP for .NET products that are updated for continued compatibility within .NET.

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Q: My immediate needs are basic: I just want to unzip a zipped file to a directory. How much work is involved?
A: All you need to do is add the Zip control to a form or use it as a reference. Then use the QuickUnzip method to uncompress the files and put them into any desired directory. Alternatively, if you just want to zip-up a directory, QuickZip can be called with a wild-card for the filename.
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Q: There are several Zip controls on the market. How is yours different?
A: While the product features are pretty similar, the technology is night and day. Most other Zip products, for example, use open source libraries, whereas Dart chose to optimize the algorithm for speed, achieving speed gains of up to 250% when compared to our competitors. The other huge difference is in the design of the object model itself. If you look at most designs, they are “flat” and resemble C++ class libraries with come parameters turned into properties. Compare that to Dart’s “rich” object design, where the Store property is a (FileStore) collection of files contained within a zip file that was previously loaded. Our products present an object model structure that is representative of the object itself, making its use an intuitive pleasure.
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Q: Why am I getting a Type Mismatch error in VBScript?
A: When using our controls in VBScript, you must specify optional parameters to prevent Type Mismatch errors.
For example, to zip a file with the FileStore, you need to create a SpanSettings instance:

Dim span
Set span = CreateObject("Dart.SpanSettings.1")
Zip1.FileStore.Zip("c:\Test\", span)

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Q: You say your compression speed is off the chart. How much compression did you have to give up?
A: Very little. When we optimized for speed, we found that compression size did not become a significant trade-off. So whereas other products allow you to optimize for EITHER speed or size, Dart gives you top speed with negligible loss in compression.
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Q: What is the maximum number of files that can be in a zip file?
A: The Deflate algorithm, which is the most compatible, specifies that no more than 65,000 files can be in a single compressed file.
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Q: Can I use the ActiveX controls in a scripting language such as VBScript?

Yes, in most environments the ActiveX controls can be used in a scripting engine such as VBScript.

However, while the controls will work on 64 bit machines in compiled environments such as VB6 and VC++, they are limited to 32 bit Operating Systems in scripting environments.

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Q: Why do I see an 'Error accessing the registry' message in VB6?
A: This error will occur on Windows Vista and Windows 7 machines when User Account Control (UAC) is on and VB6 tries to write to an inaccessible part of the registry.

You will see this error message when an ActiveX control is used for the first time. This may be when a project using the control is opened, or when the control is selected to add to the Toolbox.

After the initial failure, VB6 will select an alternate registry location to write to, and subsequent uses of the control will not produce the error.

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