In short (full story provided by links in the splash’s answer): {$RTTI EXPLICIT METHODS([]) PROPERTIES([]) FIELDS([])} Note that as of XE6 and newer, this needs to be in each individual unit for which you want to disable RTTI. Before that (XE5 and below) it could be in the DPR file and would apply to all … Read more
I can’t find anything in the TXMLDocument documentation about XPath. XML example, from the OmniXML XPath demo: <?xml version=”1.0″ encoding=”UTF-8″?> <bookstore> <book> <title lang=”eng”>Harry Potter</title> </book> <book> <title lang=”eng”>Learning XML</title> </book> <book> <title lang=”slo”>Z OmniXML v lepso prihodnost</title> <year>2006</year> </book> <book> <title>Kwe sona standwa sam</title> </book> </bookstore> Try something like this: uses XMLDoc, XMLDom, XMLIntf; … Read more
It is not possible to get a Class/Instance from a DLL. Instead of the class you can hand over an interface to the class. Below you find a simple example // The Interface-Deklaration for Main and DLL unit StringFunctions_IntfU; interface type IStringFunctions = interface [‘{240B567B-E619-48E4-8CDA-F6A722F44A71}’] function CopyStr( const AStr : WideString; Index, Count : Integer … Read more
Key messages are processed by the controls themselves who receives these messages, that’s why when you’re on a button the form is not receiving the message. So normally you would have to subclass these controls, but the VCL is kind enough to ask the parenting form what to do if the form is interested: type … Read more
Here are some links Delphi and Windows Vista User Account Control Vista UAC Manifest Here are the steps: Create XML file with following content: <?xml version=”1.0″ encoding=”UTF-8″ standalone=”yes”?> <assembly xmlns=”urn:schemas-microsoft-com:asm.v1″ manifestVersion=”1.0″> <assemblyIdentity version=”1.1.1.1″ processorArchitecture=”X86″ name=”YourApplicationExeName” type=”win32″/> <description>elevate execution level</description> <trustInfo xmlns=”urn:schemas-microsoft-com:asm.v2″> <security> <requestedPrivileges> <requestedExecutionLevel level=”requireAdministrator” uiAccess=”false”/> </requestedPrivileges> </security> </trustInfo> </assembly> Name this XML file as … Read more
The only thing I have found to work well is to use the WS_EX_COMPOSITED window style. This is a performance hog so I only enable it when in a sizing loop. It is my experience that, with the built-in controls, in my app, flickering only occurs when resizing forms. You should first perform a quick … Read more
Well, it’s hard to be sure without a lot of testing, but it certainly looks like this is a bug, either in TThreadedQueue or in TMonitor. Either way it’s in the RTL and not your code. You ought to file this as a QC report and use your example above as the “how to reproduce” … Read more
You don’t need to handle messages to implement this. You just need to implement IDropTarget and call RegisterDragDrop/RevokeDragDrop. It’s really very very simple. You can actually implement IDropTarget in your form code but I prefer to do it in a helper class that looks like this: uses Winapi.Windows, Winapi.ActiveX, Winapi.ShellAPI, System.StrUtils, Vcl.Forms; type IDragDrop = … Read more
Yes you can do that, using the ReadProcessMemory and WriteProcessMemory functions to patch the code of the current process. Basically, you get the address of the procedure or function to patch and then insert a Jump instruction to the address of the new procedure. Check this code Uses uThirdParty; //this is the unit where the … Read more
Debug info isn’t present in the file. Make sure that you’re using the Debug configuration. (Project Manager tree, expand Build Configurations, make sure Debug is bold. If it’s not, right click Debug and choose Activate from the context menu.) Make sure you then do a Build of your project, not just a Compile. If that … Read more