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- {
- > I am writing some Pascal Units for speech synthesis to be added
- > to a DOS based application. In a part of the application, character
- > strings are written to the screen. I need to capture those
- > strings from the video buffer and pass them as parameters to
- > some functions. How do I do this? If anyone can provide code,
- > I would really appreciate it!
-
- Well, that's easy, with an CGA/EGA/VGA graphics card, the video
- memory resides at $B800:0000, and is always Character-Attribute,
- two bytes, so to grab something from screen try this:
- }
-
- function onscreen(where_x, where_y, how_long : byte);
- var
- dumb : string;
- x : word;
- begin
- dumb := '';
- for x := 0 to how_long - 1 do
- dumb := dumb + chr(mem[$b800 : where_y * 160 + (where_x + x * 2)]);
- onscreen := dumb;
- end.