Have you tried calling CoInitializeSecurity() with RPC_C_AUTHN_LEVEL_CALL instead of RPC_C_AUTHN_LEVEL_CONNECT? Usually when I create DCOM clients I create COSERVERINFO and pass to CoCreateInstanceEx() with security credentials, remembering to call CoSetProxyBlanket() on all interfaces.
I wrote a series of articles last year on this, with source code. VMware and Wine detection are here. Virtual PC is here. All three of these have pretty iron-clad detection because there are documented callbacks to the hypervisor (in the case of Wine, an extension to a standard DLL). I put up an untested … Read more
Scrolling origins An action with the mouse wheel results in a WM_MOUSEWHEEL message being sent: Sent to the focus window when the mouse wheel is rotated. The DefWindowProc function propagates the message to the window’s parent. There should be no internal forwarding of the message, since DefWindowProc propagates it up the parent chain until it … Read more
What ever scheme you use, it may be handy to know that you can actually rename a running .exe file. So rename file, copy in new file works nice. And the next time someone launch the program they will launch a the new version. This is ofcourse very handy in enviroment where many users run … Read more
Let us consider the following three type declarations: TProcedure = procedure; TMethod = procedure of object; TAnonMethod = reference to procedure; These are all very similar to each other. In terms of calling instances of each of these three types, the calling code is identical. The differences arise in what can be assigned to variables … Read more
Take a closer look at TTabControl / TTabItem in the unit FMX.TabControl. This is your perfect example because it basically needs to solve the same problem. The following function is what you need to override: procedure DoAddObject(const AObject: TFmxObject); override; This is called when a control is added to your control. Override this function so … Read more
The root cause seems to be that Winforms’ textBox is not an AutomationElement, while the rest of the mentioned controls (ComboBoxes etc) are. Quoting Markus von und zu Heber’s accepted answer here: We found it in the article “Automatic Touch Keyboard for TextBoxes in WPF Applications on Windows 8+”, but it also works very good … Read more
This is from long ago as an escape character to enable you to have consts for control characters in a more readable way. const CtrlC = ^C; begin Write(Ord(CtrlC)); end. This defines a Char constant with value #3, then writes 3 in Borland Pascal 7, and I remember seeing it years before that too. I … 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
… there are downsides to using EXE compressors. Most notably: Upon startup of a compressed EXE/DLL, all of the code is decompressed from the disk image into memory in one pass, which can cause disk thrashing if the system is low on memory and is forced to access the swap file. In contrast, with uncompressed … Read more