I updated the one in the first post.
Problem with the vertical scrollbar hiding the a-z column persists (Win7-64). Four pixels extra would be enough:
inv CreateWindowEx, WS_EX_TOOLWINDOW or WS_EX_TOPMOST , soff("RichEdit20A"),soff("Ascii"),
WS_POPUP or WS_SIZEBOX or \
WS_VISIBLE or ES_MULTILINE or ES_NOHIDESEL or ES_WANTRETURN or\
ES_SAVESEL or WS_CLIPSIBLINGS or ES_READONLY or\
WS_HSCROLL or ES_AUTOHSCROLL or WS_VSCROLL or ES_AUTOVSCROLL,
0,0, 335, 60
4, 0, 0, hWin, NULL