Story Category: Software Development

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Delphi: bumped into System.Classes.TLoginCredentialService while doing a “DefaultUsrPwDm” – Google Search

jpluimers jpluimers Doing a  “DefaultUsrPwDm” – Google Search, I bumped into the System.Classes.TLoginCredentialService class. There is hardly any documentation. It was introduced as [WayBack] System.Classes.TLoginCredentialService – XE2 API Documentation with the standard TObject template: TObject is the ultimate… … Read more 3 years ago in Delphi, Development, Software Development 0

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Everything You Need To Know About App Security Is Here

Milton Coyne Milton Coyne Security should always be the top-most priority whether you are the developer of an application or the end-user. In this TCoffee and Code session, Embarcadero MVPs Jim McKeeth, Ian Barker, Charles Anderson, Zach Briggs, and… … Read more 3 years ago in API, Coding, data, Delphi, internet of things, Learn, learn delphi, object pascal, programming, SDK, Security, Software Development, tcoffee and code, Videos 0

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Delphi interface generic function – Is there a work around? – Stack Overflow

jpluimers jpluimers The documentation simply states “no”, without explaining why. Luckily, there is [WayBack] David Heffernan at [WayBack] Delphi interface generic function – Is there a work around? – Stack Overflow Interfaces do not support generic parameterized… … Read more 3 years ago in Conference Topics, Conferences, Delphi, Development, Event, Software Development 0

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DCOM calls from thread pool threads: CoInitialize/CoUnitialize location and expensiveness?

jpluimers jpluimers Interesting takeaway from [WayBack] DCOM calls from thread pool threads call CoInitialize* at the start, and call CoUninitialize before returning. Expensive, but necessary Related: [WayBack] 123683 – CoInitialize should be called at most once per thread… … Read more 4 years ago in .NET, C++, COM/DCOM/COM+, Delphi, Development, Software Development, Windows Development 0

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“No mapping for the Unicode character exists in the target multi-byte code page”

jpluimers jpluimers Usually when I see this error [Wayback] “No mapping for the Unicode character exists in the target multi-byte code page” – Google Search, it is in legacy code that uses string buffers where decoding or… … Read more 4 years ago in .NET, Base64, C++, Delphi, Development, Encoding, Software Development, Unicode 0

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delphi – Is it possible to define {$IFDEF} for more than one directive at once? – Stack Overflow

jpluimers jpluimers [WayBack] delphi – Is it possible to define {$IFDEF} for more than one directive at once? – Stack Overflow: use the {$IF Defined(xxx)} directive which allows boolean expressions like: {$IF Defined(xxx) OR Defined(yyy)} {$IF Defined(xxx)… … Read more 4 years ago in Delphi, Delphi 6, Development, Software Development 0

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“Delphi” “Data provider or other service returned an E_FAIL status” “NVARCHAR” – Google Search

jpluimers jpluimers For my link archive: [Archive.is] “Delphi” “Data provider or other service returned an E_FAIL status” “NVARCHAR” – Google Search In this case it was while reading data. Cause yet unknown, as over time the error… … Read more 4 years ago in Delphi, Development, Software Development 0

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Too bad the Delphi IDE does not find the formatter settings when searching for “Margin” or “Right”, despite the setting is named “Right margin”

jpluimers jpluimers IDEs drive me nuts, including the Delphi IDE. Searching for Margin or Setting only reveals the margin and gutter setting, not the formatter settings. So you have to remember this is in the “Formatter”, especially… … Read more 4 years ago in Delphi, Development, Software Development 0

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ODAC: calling SYS.DBMS_SESSION.SET_NLS failing with ORA-06550/PLS-00103

jpluimers jpluimers Do not call SYS.DBMS_SESSION.SET_NLS with an instance of the [Archive.is] TOraStoredProc Class, as under the hood, it will translate the call to this: Class:Ora.TOraStoredProc;Component:sprSetNls;Flag:tfQPrepare,Text:Prepare: begin SYS.DBMS_SESSION.SET_NLS(:PARAM, :VALUE); end; :PARAM(VARCHAR[22],IN)=’NLS_NUMERIC_CHARACTERS’ :VALUE(VARCHAR[4],IN)=”.,” The above is a translation… … Read more 4 years ago in Database Development, Delphi, Development, OracleDB, Software Development 0

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ODAC undocumented exception ‘Need Oracle 8 Call Interface’

jpluimers jpluimers I got this when taking over maintenance of some legacy code that called a stored procedure in a : ————————— Debugger Exception Notification ————————— Project LegacyProject.exe raised exception class Exception with message ‘Need Oracle 8… … Read more 4 years ago in Database Development, Delphi, Development, OracleDB, Software Development 0

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Delphi: When porting really old code from versions that did not have .dproj files, watch your .dfg and .dof files

jpluimers jpluimers I have been bitten by this a few times too much, so time to write it down: When porting old Delphi code from the Delphi 7 and older era, the options were stored .dof (options)… … Read more 4 years ago in Delphi, Development, Software Development 0