如何从窗口获取文本？

Question

Here my function:

def getEditText(hwnd):
    result = []
    bufferlength = struct.pack('i', 255)
    linecount = win32gui.SendMessage(hwnd, win32con.EM_GETLINECOUNT, 0, 0)
    print"--- linecount :",linecount

    for line in range(linecount):
        linetext = bufferlength + "".ljust(253)        
        linelength = win32gui.SendMessage(hwnd, win32con.EM_GETLINE, line, linetext)
 myLigne=linetext[:linelength] 
 print"  ",myLigne
        result.append(myLigne)
    return result
resultat=getEditText(hwmdTexte)

I want to get the text from a widget but this doesn't work. There are several lines in the widget of my application but I have linecount=0 and of course no text... Could you please help me.

Answer 1

Thanks for your answer. I've just tried def

GetText(hwnd):
    buf_size = 1 + win32gui.SendMessage(hwnd, win32con.WM_GETTEXTLENGTH, 0, 0)
    buffer = win32gui.PyMakeBuffer(buf_size)
    win32gui.SendMessage(hwnd, win32con.WM_GETTEXT, buf_size, buffer)
    return buffer[:buf_size]    

But this doesn't get the text of my widget. This function returns NUL...