@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: The GetWindowTextLength API !!!!C# Signature: /// <summary> /// Retrieves the length, in characters, of the specified window's title bar text (if the window has a title bar). If /// the specified window is a control, the function retrieves the length of the text within the control. However, /// GetWindowTextLength cannot retrieve the length of the text of an edit control in another application. /// <para> /// Go to https://msdn.microsoft.com/en-us/library/windows/desktop/ms633521%28v=vs.85%29.aspx for more /// information /// </para> /// </summary> /// <param name="hWnd">C++ ( hWnd [in]. Type: HWND )<br />A <see cref="IntPtr" /> handle to the window or control.</param> /// <returns> /// If the function succeeds, the return value is the length, in characters, of the text. Under certain /// conditions, this value may actually be greater than the length of the text.<br />For more information, see the /// following Remarks section. If the window has no text, the return value is zero.To get extended error information, /// call GetLastError. /// </returns> /// <remarks> /// If the target window is owned by the current process, <see cref="GetWindowTextLength" /> causes a /// WM_GETTEXTLENGTH message to be sent to the specified window or control.<br />Under certain conditions, the /// <see cref="GetWindowTextLength" /> function may return a value that is larger than the actual length of the /// text.This occurs with certain mixtures of ANSI and Unicode, and is due to the system allowing for the possible /// existence of double-byte character set (DBCS) characters within the text. The return value, however, will always be /// at least as large as the actual length of the text; you can thus always use it to guide buffer allocation. This /// behavior can occur when an application uses both ANSI functions and common dialogs, which use Unicode.It can also /// occur when an application uses the ANSI version of <see cref="GetWindowTextLength" /> with a window whose window /// procedure is Unicode, or the Unicode version of <see cref="GetWindowTextLength" /> with a window whose window /// procedure is ANSI.<br />For more information on ANSI and ANSI functions, see Conventions for Function Prototypes. /// <br />To obtain the exact length of the text, use the WM_GETTEXT, LB_GETTEXT, or CB_GETLBTEXT messages, or the /// GetWindowText function. /// </remarks> [DllImport("user32.dll", SetLastError=true, CharSet=CharSet.Auto)] static extern int GetWindowTextLength(IntPtr hWnd); !!!!VB.NET Signature: <DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _ Private Shared Function GetWindowTextLength(ByVal hwnd As IntPtr) As Integer End Function !!!!Oxygene.NET Signature: [DllImport("user32.dll", SetLastError := true, CharSet := CharSet.Auto)] class method GetWindowTextLength(hWnd: IntPtr): Int32; external; !!!!VB Signature: Public Declare Function GetWindowTextLength Lib "user32.dll" Alias "GetWindowTextLengthA" _ (ByVal hWnd As Long) As Long !!!!User-Defined Types: None. !!!!Notes: None. !!!!Tips & Tricks: Often used with GetWindowText !!!!Sample Code: (See GetWindowText.) !!!!Alternative Managed API: Do you know one? Please contribute it! Documentation: GetWindowTextLength@msdn on MSDN
Edit user32.GetWindowTex
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