If the specified window is a topmost window, the handle identifies a topmost window. The retrieved handle identifies the window of the same type that is highest in the Z order. The retrieved handle identifies the enabled popup window owned by the specified window (the search uses the first such window found using GW_HWNDNEXT) otherwise, if there are no enabled popup windows, the retrieved handle is that of the specified window. The function examines only child windows of the specified window. The retrieved handle identifies the child window at the top of the Z order, if the specified window is a parent window otherwise, the retrieved handle is NULL.
This parameter can be one of the following values. The relationship between the specified window and the window whose handle is to be retrieved. The window handle retrieved is relative to this window, based on the value of the uCmd parameter. Syntax HWND GetWindow(Ī handle to a window. The following example code demonstrates a call to GetWindowTextA.Retrieves a handle to a window that has the specified relationship ( Z-Order or owner) to the specified window. To retrieve the text of a control in another process, send a WM_GETTEXT message directly instead of calling GetWindowText. However, if the target window is not responding and it belongs to the calling application, GetWindowText will cause the calling application to become unresponsive. It allows applications to call GetWindowText without becoming unresponsive if the process that owns the target window is not responding. If the window does not have a caption, the return value is a null string. If the target window is owned by another process and has a caption, GetWindowText retrieves the window caption text. If the target window is owned by the current process, GetWindowText causes a WM_GETTEXT message to be sent to the specified window or control. This function cannot retrieve the text of an edit control in another application. To get extended error information, call GetLastError. If the window has no title bar or text, if the title bar is empty, or if the window or control handle is invalid, the return value is zero. If the function succeeds, the return value is the length, in characters, of the copied string, not including the terminating null character. If the text exceeds this limit, it is truncated. The maximum number of characters to copy to the buffer, including the null character. If the string is as long or longer than the buffer, the string is truncated and terminated with a null character. parameters -param hWnd Ī handle to the window or control containing the text. However, GetWindowText cannot retrieve the text of a control in another application. If the specified window is a control, the text of the control is copied. Ext-ms-win-ntuser-window-l1-1-4 (introduced in Windows 10, version 3)Ĭopies the text of the specified window's title bar (if it has one) into a buffer.
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