MSDN states: Interprocess Communication Between 32-bit and 64-bit Applications 64-bit versions of Windows use 32-bit handles for interoperability. When sharing a handle between 32-bit and 64-bit applications, only the lower 32 bits are significant, so it is safe to truncate the handle (when passing it from 64-bit to 32-bit) or sign-extend the handle (when passing … Read more
Since GDI forms on Delphi don’t support alpha channels (unless using alpha layered windows, which might not be suitable), commonly the black color will be taken as the transparent one, unless the component supports alpha channels. tl;dr Just use your TTransparentCanvas class, .Rectangle(0,0,Width+1,Height+1,222), using the color obtained with DwmGetColorizationColor that you could blend with a … Read more
Try below code, killProcessByName() will kill any process with name filename : #include <windows.h> #include <process.h> #include <Tlhelp32.h> #include <winbase.h> #include <string.h> void killProcessByName(const char *filename) { HANDLE hSnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPALL, NULL); PROCESSENTRY32 pEntry; pEntry.dwSize = sizeof (pEntry); BOOL hRes = Process32First(hSnapShot, &pEntry); while (hRes) { if (strcmp(pEntry.szExeFile, filename) == 0) { HANDLE hProcess = … Read more
Brent Fulgham has put lots of work into producing a Windows Cairo port of WebKit, which doesn’t rely on Apple’s proprietary backend stuff (e.g. CoreGraphics, CoreFoundation, CFNetwork). I believe that is what you are after. The details aren’t entirely collated in one place, but there is some information in the Trac wiki and other bits … 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
If its just a console app you can also use the CREATE_NO_WINDOW flag as part of the CreateProcess call itself, e.g. CreateProcess(NULL, lpszCommandLine, NULL, NULL, FALSE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi); Also, see this page for information about environment variables.
So if I want to pass a list to my callback function through WinApi I use GCHandle // object to IntPtr (before calling WinApi): List<string> list1 = new List<string>(); GCHandle handle1 = GCHandle.Alloc(list1); IntPtr parameter = (IntPtr) handle1; // call WinAPi and pass the parameter here // then free the handle when not needed: handle1.Free(); … Read more
Sample code Thanks to an email I got this morning, I was prompted to make a working sample app demonstrating this very functionality. I’ve done that now; you can find it on GitHub (or in the now-archived CodePlex). Just clone the repository or download and extract an archive, then open it in Visual Studio, and … Read more
You must always use the Marshal.GetLastWin32Error. The main problem is the garbage collector. If it runs between the call of SetVolumeLabel and the call of GetLastError then you will receive the wrong value, because the GC has surely overwritten the last result. Therefore you always need to specify the SetLastError=true in the DllImport-Attribute: [DllImport(“kernel32.dll”, SetLastError=true)] … Read more
A non-static class method has a hidden this parameter. That is what prevents the method from being used as a WndProc (or any other API callback). You must declare the class method as static to remove that this parameter. But as you already noticed, you cannot access non-static members from a static method. You need … Read more