To see this example in context, see Sending a Message. PszMem = (PSTR) VirtualAlloc((LPVOID) NULL, Allocate memory for the string and copy hwndCombo = GetDlgItem(hwndDlg, IDD_COMBO) ĬTxtLen = GetWindowTextLength(hwndCombo) SET CSTRING GETWINDOWTEXT CODEMixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. The following example code demonstrates a call to GetWindowTextA. The winuser.h header defines SetWindowText as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. 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. BOOL WINAPI SetWindowText( HWND hWnd, const wchart lpString ) So, basically, the input string is passed as a constant (that is, read-only) wchart character pointer, with the assumption that the string pointed to is NUL-terminated, in a classical, pure-C style. 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. OnOK()), call GetWindowText to set the values. You could add member variables to MyDlg to contain the strings in some appropriate place (e.g. SET CSTRING GETWINDOWTEXT WINDOWSThis function cannot retrieve the text of an edit control in another application. Additionally, you cannot call GetWindowText() after a call to DoModal() has returned, as the windows no longer exist. 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. GetWindowText(strPitch) double pitch ttof(strPitch) CString strGain medtGain.GetWindowText(strGain). Parameters lpszStringBuf Points to the buffer that is to receive the copied string of the window’s title. It is 0 if CWnd has no caption or if the caption is empty. When I replaced it by SendMessage(.,WMGETTEXT it fixed the problem. void GetWindowText ( CString& rString ) const Return Value Specifies the length, in bytes, of the copied string, not including the terminating null character. The facts are that I was using GetWindowText and from time to time got empty strings. If the string is as long or longer than the buffer, the string is truncated and terminated with a null character. Get and set the playback position and volume. I also thought that everybody is using GetWindowText and it can not be true that there is a problem with it. GetWindowText is a member of CWindow, which is an ATL class that doesnt know anything about WTLs CString. Syntax int GetWindowTextA(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. SetTicFreq( 5 ) CString msg msg.LoadString( IDSTTSMSG1JAPANESE ) meditText.SetWindowText( msg ) msg.LoadString( IDSTTSMSG2ENGLISH ) meditText2. This member function causes the WM_GETTEXT message to be sent to the CWnd object.Copies the text of the specified window's title bar (if it has one) into a buffer. If the CWnd object is a control, the GetWindowText member function copies the text within the control instead of copying the caption. If the string is longer than the number of characters specified in nMaxCount, it is truncated.Ī CString object that is to receive the copied string of the window’s title.Ĭopies the CWnd caption title (if it has one) into the buffer pointed to by lpszStringBuf or into the destination string rString. Specifies the maximum number of characters to be copied to the buffer. Points to the buffer that is to receive the copied string of the window’s title. Specifies the length, in bytes, of the copied string, not including the terminating null character. Void GetWindowText( CString& rString ) const Int GetWindowText( LPTSTR lpszStringBuf, int nMaxCount ) const
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