EM_FINDTEXTEX always returns 0

Question

i have this small code. the problem is, result is always 0, no matter what searchword i use.

static void findtext(HWND hwnd, const char *SearchWord)
{
    FINDTEXTEX ft;
    char text[256];
        
    ft.chrg.cpMin = 0;
    ft.chrg.cpMax = GetWindowTextLength(hwnd);
    ft.lpstrText = (LPCSTR)SearchWord;

    int result = SendMessage(hwnd, EM_FINDTEXTEX, (WPARAM)FR_DOWN, (LPARAM)&ft);
    GetWindowText(hwnd, text, 256);

    log_message("result [%d]", result);
    log_message("ft.chrg.cpMin [%d]", ft.chrg.cpMin);
    log_message("ft.chrg.cpMax [%d]", ft.chrg.cpMax);
    log_message("ft.lpstrText [%s]", ft.lpstrText);
    log_message("text [%s]\n", text);
}

as you see i did some logging, and all seems to be fine. log output:

result[0]
ft.chrg.cpMin [0]
ft.chrg.cpMax [26]
ft.lpstrText [basic]
text [hello this is a basic test]

why is result 0? i would expect either a proper value or -1? ft.lpstrText can be complete nonsense still i get result 0.