EnumWindows enumerates all the top level windows in a process. GetWindowThreadProcessId gets the process and Id of each thread. You now have enough information to gracefully close any GUI application. You can send WM_CLOSE messages to any window you wish to close. Many windows handle WM_CLOSE to prompt the user to save documents.You can send … Read more
I admit, this problem has been vexing me for some days now. From walking the return values and the contents of GetLastError, I’ve determined that this code should be working correctly according to the system. Because it clearly isn’t (it seems to enter an undefined state that inhibits the service handler from running successfully), I’ve … Read more
Use a tool to dump the export table from a shared library (for example, a .dll such as kernel32.dll). You’ll see the named entry points and/or the ordinal entry points. Generally for windows the named entry points are unmangled (extern “C”). You will most likely need to do some peeking at the assembly code and … Read more
Colorization color != the base color chosen. It’s misleading, I know. But I’m confused. The image you borrowed was from my post entitled “Retrieving Aero Glass base color for opaque surface rendering”. Is this not what you want to do? I also indicated in the post the registry location in which all the color information … Read more
Ownership is a relationship between two top level windows while Parent is a relationship between a top level and a WS_CHILD, or a WS_CHILD and another WS_CHILD. The parent of a button is the form it is on, while a message box is owned by the form that showed it. Read this article from Microsoft … Read more
The active window (the result of GetActiveWindow()) is the window attached to the calling thread that gets input. The foreground window (the result of of GetForegroundWindow()) is the window that’s currently getting input regardless of its relationship to the calling thread. The active window is essentially localized to your application; the foreground window is global … Read more
The EnumSerialPorts v1.20 suggested by Nick D uses nine different methods to list the serial ports! We’re certainly not short on choice, though the results seem to vary. To save others the trouble, I’ll list them here and indicate their success in finding the com0com ports on my PC (XP Pro SP2): CreateFile(“COM” + 1->255) … Read more
If memory serves, GetModuleHandle(NULL); returns the instance handle.
The A functions use Ansi (not ASCII) strings as input and output, and the W functions use Unicode string instead (UCS-2 on NT4 and earlier, UTF-16 on W2K and later). Refer to MSDN for more details.