HWNDBOTTOM

HWNDBOTTOM is a constant used in Windows programming, specifically within the Windows API. It represents a specific window handle, or HWND, that refers to the bottom-most window in the Z-order of a given window. The Z-order refers to the stacking order of windows on the screen. When you use HWNDBOTTOM, you are typically interacting with functions that manipulate or query the order of sibling windows. For instance, it might be used in conjunction with functions like EnumWindows or SetWindowPos to identify or reorder windows relative to the bottom of the stack. It's important to note that HWNDBOTTOM does not refer to the bottom edge of a single window's client area, but rather the entire window itself as it sits at the lowest position on the desktop's window layering. This constant is a fundamental part of how the Windows operating system manages and displays multiple overlapping windows.