|
Using Macros for Error Handling
OLE defines a number of macros that make it easier to work with SCODEs on
16-bit platforms and HRESULTs on both platforms. Some of the macros and functions
below provide conversion between the two data types and are quite useful in code
that runs only on 16-bit platforms, code that runs on both 16-bit and 32-bit
platforms, and 16-bit code that is being ported to a 32-bit platform. These same
macros are meaningless in 32-bit environments and are available in order to
provide compatibility and make porting easier. Newly written code should use the HRESULT macros and functions.
Error handling macros are listed below. Refer to The OLE Programmer's Reference for a complete description of each.
Macro
| Description
| GetScode
| (Obsolete) Returns an SCODE given an HRESULT.
| ResultFromScode
| (Obsolete) Returns an HRESULT given an SCODE.
| PropagateResult
| (Obsolete) Generates an HRESULT to return to a function in cases where an
error is being returned from an internally called function.
| MAKE_HRESULT
| Returns an HRESULT given an SCODE that represents an error.
| MAKE_SCODE
| Returns an SCODE given an HRESULT.
| HRESULT_CODE
| Extracts the error code part of the HRESULT.
| HRESULT_FACILITY
| Extracts the facility from the HRESULT.
| HRESULT_SEVERITY
| Extracts the severity bit from the SEVERITY.
| SCODE_CODE
| Extracts the error code part of the SCODE.
| SCODE_FACILITY
| Extracts the facility from the SCODE.
| SCODE_SEVERITY
| Extracts the severity field from the SCODE.
| SUCCEEDED
| Tests the severity of the SCODE or HRESULT - returns TRUE if the severity is
zero and FALSE if it is one.
| FAILED
| Tests the severity of the SCODE or HRESULT - returns TRUE if the severity is
one and FALSE if it is zero.
| IS_ERROR
| Provides a generic test for errors on any status value.
| FACILITY_NT_BIT
| Defines bits so macros are guaranteed to work.
| RESULT_FROM_WIN32
| Maps a Win32 error value into an HRESULT. This assumes that Win32 errors fall
in the range -32k to 32k.
| HRESULT_FORM_NT
| Maps an NT status value into an HRESULT.
|
Note Calling MAKE_HRESULT for S_OK verification carries a performance penalty. You should not routinely
use MAKE_HRESULT for successful results.
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
