WinShow

Unhides the specified window.

WinShow WinTitle, WinText, ExcludeTitle, ExcludeText

WinTitle

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

WinText

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.

ExcludeTitle

Windows whose titles include this value will not be considered.

ExcludeText

Windows whose text include this value will not be considered.

By default, WinShow is the only function that can always detect hidden windows. Other built-in functions can detect them only if DetectHiddenWindows has been turned on.

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

WinHide, SetTitleMatchMode, DetectHiddenWindows, Last Found Window

Run "notepad.exe"
WinWait "Untitled - Notepad"
Sleep 500
WinHide  ; Because its parameter is omitted, it uses the window found above.
Sleep 1000
WinShow