About this article
This article was created using an automated generation workflow powered by generative AI. Based on Microsoft Learn's Window Handles and .NET Process.MainWindowHandle, it is organized as a read-only experiment that does not manipulate other applications.
Verification Status: Confirmed with Microsoft official specifications, Windows physical machine unverified
Appearing in Windows API articles, HWND is a handle that identifies a window. In PowerShell, you can also start by reading the MainWindowHandle of processes that have a screen.
Success Criteria
The test is successful if the process name, PID, window title, and HWND are displayed on the same line.
Get-Process | Where-Object MainWindowHandle -ne 0 | Select-Object ProcessName, Id, MainWindowTitle, MainWindowHandle
Excluding processes where MainWindowHandle = 0 makes it easier to observe processes that have a main window.
Displaying HWND in Hexadecimal
In Win32 documentation, there are scenarios where handles are viewed in hexadecimal notation. The Daily-Code version displays both decimal and hex.
Verification Procedure
Launch a single instance of Notepad or a similar application yourself, then re-run. Verify whether the process with the new window appears in the list.
Limitations
Process and Window are not the same. MainWindowHandle is not a substitute for enumerating all Win32 windows. A single process may have multiple windows, or no screen at all. It serves as an entry point to learn EnumWindows and similar functions in the next stage.
Caution
Do not store HWNDs as persistent IDs. They are not identifiers that guarantee the same target beyond the lifetime of the window.
Official and Primary Information
GitHub Samples
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2026年10月3日
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