All methods and properties of objects in Scanning Services return an HRESULT (as all COM objects do). An OLE/COM HRESULT is a bit-packed structure whose members may be de-referenced using macros provided by OLE. COM objects in Scanning Services also support the IErrorInfo interface. This interface exposes methods such as GetDescription, allowing clients to extract error details from OLE/COM servers.
The value of HRESULT returned by Scanning Services on failure is created using the macro MAKE_HRESULT that takes 3 parameters.
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Parameter |
Value |
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Severity |
11 (Error) |
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Facility |
4 (ITS_FACILITY) |
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Error Code |
5001-5011, 63212-63244 |
When a method fails, the programmer will obviously want to find out additional details about the error. The technique for doing this will vary by development platform/language.
The errors reported by objects in Scanning Services fall into two categories:
You can determine the source of the error by examining the Source attribute of the error object.
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Parameter |
Value of Source |
|---|---|
|
Errors from ScanTools Plus Link.dll |
ScanTools Plus Link.dll |
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Errors from ScanTools Plus |
Component.IKernelOperation |
Handling Exceptions - Visual Basic Example
Handling Exceptions - Visual C++ using Smart Pointers Example
Scanning Services Exceptions List
ScanTools Plus Exceptions List
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See Help on Help for additional information on using this help file. See Scantron Technical Support for additional information on technical support and training options. See the ScanTools Suite System Requirements for further details on hardware and software requirements. ScanTools is a suite of products; the specific information you want may appear in the help for a different module. If you don't find what you're looking for here, try one of the following:
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Scantron Corporation
Customer Service (forms, products, and services): 1-800-SCANTRON (722-6876) Technical Support: 1-800-445-3141 |
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