The window management functions allow an application to create, display, move, size, destroy and otherwise manage windows.
The window functions include:
| Function | Description |
| AdjustWindowRect | Computes the size of a window to fit a given client area |
| AdjustWindowRectEx | Computes a required size for a window. |
| AnyPopup | Indicates whether any pop-up window exists |
| CloseWindow | Hides the specified window or minimizes it |
| EnableWindow | Enables and disables mouse and keyboard input throughout the application |
| EnumChildWindows | Enumerates the child windows that belong to a specific parent window |
| EnumThreadWindows | Enumerates windows for a thread. |
| EnumWindows | Enumerates windows on the display |
| FindWindow | Returns the handle of a window with the given class and caption |
| GetActiveWindow | Returns a handle to the active window |
| GetClassInfo | Retrieves information about a specified class |
| GetClassLong | Retrieves window-class information from a WNDCLASS structure |
| GetClassName | Retrieves a window-class name |
| GetClassWord | Retrieves window-class information from a WNDCLASS structure |
| GetClientRect | Copies the coordinates of a window's client area |
| GetDesktopHwnd | |
| GetDesktopWindow | Gets the current desktop window handle. |
| GetFocus | Retrieves the handle of the window that currently owns the input focus |
| GetLastActivePopup | Determines which popup window owned by another window was most recently active |
| GetNextWindow | Returns a handle to the next or previous window |
| GetParent | Retrieves the handle of the specified window's parent window |
| GetTopWindow | Returns a handle to the top-level child window |
| GetWindow | Returns a handle from the window manager's list |
| GetWindowLong | Retrieves information about a window |
| GetWindowRect | Copies the dimensions of an entire window |
| GetWindowTask | Returns the handle of a task associated with a window |
| GetWindowText | Copies a window caption into a buffer |
| GetWindowTextLength | Returns the length (in characters) of the given window's caption or text |
| GetWindowThreadProcessIdnew | Retrieves the ids of the thread and process for a window. |
| GetWindowWord | Retrieves information about a window |
| IsChild | Determines whether a window is the descendent of a specified window |
| IsIconic | Specifies whether a window is open or closed (iconic) |
| IsWindow | Determines whether a window is a valid, existing window |
| IsWindowEnabled | Determines whether the specified window is enabled for mouse and keyboard input |
| IsWindowUnicode | Determines whether the window is ANSI or Unicode |
| IsWindowVisible | Determines whether the given window is visible |
| LockWindowUpdate | Enables drawing in a window. |
| OpenIcon | Opens the specified window |
| PtVisible | Tests whether a point lies in a region |
| RectVisible | Determines whether part of a rectangle lies in a region |
| RedrawWindow | Updates the specified area. |
| RegisterClass | Registers a window class |
| SetActiveWindow | Makes a window the active window |
| SetClassLong | Replaces information in a WNDCLASS structure |
| SetClassWord | Replaces information in a WNDCLASS structure |
| SetFocus | Assigns the input focus to a specified window |
| SetInputFocus | Sets the input focus to the specified thread or window |
| SetParent | Changes the parent window of a child window |
| SetSysModalWindow | Makes the specified window a system modal window |
| SetWindowLong | Changes a window attribute |
| SetWindowText | Sets the window caption or text |
| SetWindowWord | Changes a window attribute |
| ShowOwnedPopups | Shows or hides all pop-up windows |
| ShowWindow | Displays or removes the given window |
| UnregisterClass | Removes a window class from the window-class table |
| UpdateWindow | Notifies the application when parts of a window need redrawing |
| CreateWindow | Creates overlapped, pop-up, and child windows“ |
| CreateWindowEx | Creates overlapped, pop-up, and child windows with extended styles” |
| DestroyWindow | Destroys a window |
| BeginDeferWindowPos | Initializes memory used by the DeferWindowPos function |
| BringWindowToTop | Brings a window to the top of a stack of overlapped windows |
| DeferWindowPos | Records positioning information for a window to be moved or resized by the EndDeferWindowPos function |
| EndDeferWindowPos | Positions or sizes several windows simultaneously based on information recorded by the DeferWindowPos function |
| IsZoomed | Determines whether a window is maximized |
| MoveWindow | Changes the size and position of a window |
| SetWindowPos | Changes the size, position, and ordering of child or pop-up windows |
| WindowFromPoint | Identifies the window containing a specified point |
| ScreenToClient | Converts screen coordinates into client coordinates |
| ChildWindowFromPoint | Determines which child window contains a specific point |
| ClientToScreen | Converts client coordinates into screen coordinates |