Enlarges the specified window to its maximum size.

WinMaximize [, WinTitle, WinText, ExcludeTitle, ExcludeText]



A window title or other criteria identifying the target window. See WinTitle.


If present, this parameter must be a substring from a single text element of the target window (as revealed by the included Window Spy utility). Hidden text elements are detected if DetectHiddenText is ON.


Windows whose titles include this value will not be considered.


Windows whose text include this value will not be considered.


Use WinRestore to unmaximize a window and WinMinimize to minimize it.

If a particular type of window does not respond correctly to WinMaximize, try using the following instead:

PostMessage, 0x112, 0xF030,,, WinTitle, WinText  ; 0x112 = WM_SYSCOMMAND, 0xF030 = SC_MAXIMIZE

This command operates only upon the topmost matching window except when WinTitle is ahk_group GroupName, in which case all windows in the group are affected.

Window titles and text are case sensitive. Hidden windows are not detected unless DetectHiddenWindows has been turned on.


WinRestore, WinMinimize


Run, notepad.exe
WinWait, Untitled - Notepad
WinMaximize ; use the window found above

^Up::WinMaximize, A  ; Assign a hotkey to maximize the active window.