int len GetWindowTextLength (hwnd) wstring str str.resize (len) // make enough room in string GetWindowText (hwnd, &str 0, len+1) Note that the length value returned by GetWindowTextLength () excludes the terminating NUL. X = GetWindowText(Form1.hWnd, buffer, n + 1)ĭebug. An option would be to make enough room inside the string for storing text in it. ' Create a string of n+1 to receive the title (to allow for the ending vbNullChar LpString Fixed-length string that receives the title of the window.Ĭch The length in characters of lpString.Įxample: ' Read the number of characters in the title of Form1

Hwnd The handle of the window to read the title of. Remember to define UNICODE before including. That is, use wchart instead of char, and use std::wstring instead of std::string.

The function returns the length of the string returned, or 0 if an error occured. For modern Windows programming (that means, after the year 2000 when Microsoft introduced the Layer for Unicode for Windows 9x), you're far better off using 'Unicode', which in C++ in Windows means using wchart. This function works with any window, not just those in your application! The text is put into the string variable passed as lpString. GetWindowText reads the title of a window (that is, its.

Windows 95 API Guide: GetWindowText Function GetWindowText Functionĭeclare Function GetWindowText Lib 'user32.dll' Alias 'GetWindowTextA' (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long

Getwindowtext