the different between "WM_GETTEXT" and GetWindowText()

[wanglei1980]

Hello :) Recently I have been disturbed by the window message "WM_GETTEXT" and the function GetWindowText(). By sending message "WM_GETTEXT" I can get the content of the edit control in the other process while failed by using "GetWindowText". I can not find any difference between sending "WM_GETTEXT" and using "GetWindowText()". Can you tell me why:doh::doh::doh: wanglei

[Cedric Moonen]

MFC objects (at least CWnd objects) cannot be used across separate threads, that's why it doesn't work.

[David Crow]

While GetWindowText() does send a WM_GETTEXT message, it does so only if the window belongs to the current process. If the window belongs to a different process and has a caption, GetWindowText() retrieves the window caption text. If the window does not have a caption, the return value is a null string. This is all spelled out in the documentation.

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