i would relaunch yourself as elevated, passing command line parameters indicating what elevated thing you want to do. You can then jump right to the appropriate form, or just save your HKLM stuff. function RunAsAdmin(hWnd: HWND; filename: string; Parameters: string): Boolean; { See Step 3: Redesign for UAC Compatibility (UAC) http://msdn.microsoft.com/en-us/library/bb756922.aspx This code is released … Read more
Note that this answer only lists new language features not new VCL/FMX features. Here are the links to the RAD Studio docwiki: What’s new in Rad Studio 10.4 Sydney What’s new in Rad Studio 10.3 Rio What’s new in Delphi and C++Builder 10.2 Tokyo What’s new in Delphi and C++Builder 10.1 Berlin What’s new in … Read more
For the price, you cannot beat FastMM4 as a memory tracker. It’s simple to use yet powerful and well integrated with Delphi. I guess that you know that, without downloading, installing or changing anything else, just putting this line ReportMemoryLeaksOnShutDown := True; anywhere in your code, will enable basic reporting of memory leaks. If you … Read more
This trick was never officially supported by the language and you have been getting away with it to date due to the implementation specifics of the 32 bit compiler. The documentation is clear: Nested procedures and functions (routines declared within other routines) cannot be used as procedural values. If I recall correctly, an extra, hidden, … Read more
You can navigate to the front page of the Embarcadero documentation and search from there. The link is: http://docwiki.embarcadero.com/RADStudio/en/Main_Page Note that no version is included in the link. If you navigate to that link then the site will re-direct you to a version specific URL for the latest release. In this case, as I write … Read more
This is a very broad question with many different angles. The meaning of the Assigned function Much of the code in your question betrays an incorrect understanding of the Assigned function. The documentation states this: Tests for a nil (unassigned) pointer or procedural variable. Use Assigned to determine whether the pointer or the procedure referenced … Read more
Opt in to the browser emulation feature using the documented registry key. Depending on the browser emulation setting that you selected, you may need to ensure that your document contains a suitable DOCTYPE. Again, this is described in the documentation. So, for example, if you wish to make the simplest possible change you would add … Read more
Yes, this is the documented behaviour: Object fields are always initialized to 0, 0.0, ”, False, nil or whatever applies. Global variables are always initialized to 0 etc as well; Local reference-counted* variables are always initialized to nil or ”; Local non reference-counted* variables are uninitialized so you have to assign a value before you … Read more
In regular Delphi functions, the function return is actually a parameter passed by reference, even though syntactically it looks and feels like an ‘out’ parameter. You can test this out like so (this may be version dependent): function DoNothing: IInterface; begin if Assigned(Result) then ShowMessage(‘result assigned before invocation’) else ShowMessage(‘result NOT assigned before invocation’); end; … Read more