Code:
char* buf;
    int len = GetWindowTextLength(GetDlgItem(hwnd,TxtBox));
    buf = (char*)GlobalAlloc(GPTR, len + 1);

    GetDlgItemText(hwnd, TxtBox, buf, len + 1 );

    SendMessage(edit_hwnd, WM_SETTEXT, 0,(LPARAM)(LPCTSTR)buf); // Upisi trazenu rec

    /*//////////////////////////////////////////////////////////////////////////////*/

    HWND osmt = GetDlgItem(search_hwnd,150);

    char* buf2;
    int len2 = SendMessage(osmt,WM_GETTEXTLENGTH,0,0);
    
    buf2 = (char*)GlobalAlloc(GPTR, len2 + 1);
    SendMessage(osmt,WM_GETTEXT,len2,(LPARAM)(LPCTSTR)buf2);


    SetDlgItemText(hwnd,1003,LPCTSTR(buf2));