I notice that of the 5 lines you've pasted, only 2 of them have been un-broken - the second and the last. These are also the shortest two lines.
I just made a dialog app with a single multi-line edit, pasting your data into it - it's fine and looks like your original. (it was wider than the text). I then narrowed it considerably, hoping to get the same output - nope, no luck. The whole string is no longer visible, but there are still only 5 lines of text.
About then I realized that my edit-box has just two styles attached. ES_MULTILINE and more particularly ES_AUTOHSCROLL. ES_MULTILINE will wrap if the text is too wide for the box or if it contains line-breaks. ES_AUTOHSCROLL on the other hand, allows text to run longer than the control.
Here's the resource-code for the dialog I used to test it with:
LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
DLG_MAIN DIALOG 0, 0, 343, 151
STYLE DS_3DLOOK | DS_CENTER | DS_MODALFRAME | DS_SHELLFONT | WS_CAPTION | WS_VISIBLE | WS_POPUP | WS_SYSMENU
CAPTION "Dialog"
FONT 8, "Ms Shell Dlg"
{
EDITTEXT IDC_EDIT1, 7, 7, 264, 96, ES_AUTOHSCROLL | ES_MULTILINE
}
If I then remove the ES_AUTOHSCROLL from the narrower edit box, I then get the following:
gisG+B76G6+NLubeCwJBzHF
+gqc0inH7Yth4GaBU72BD31DrQl7KR70VaMngvmcOX92e2i
L+52b2EXJtMT4NsKLjBTQzEbRz6s4oz
+PtE40uO5Iinlhyyliwf0oTDY807YTK9ZbXb5yZ
pfLFWRBGmZC0W12zvoTNmkG8fxt785J
+xZbxZeMjaWwJvww4BOo79UaRQdcmCKhIY8IIrj
iqhhbXPhFen1kyyALFwuo0x/rgjYtJMaha4zHHY1QVoEBM101mSHKizY2S9pM9o
nyas7It
Ki6lA5mFJcTGPQP3+LZreYDsdDTQ4DpeMGEF5ypBCAM9lQIjTU/Xpy19zqCw0A
==