Separate parsing from rendering to eliminate per-character GDI calls.
ProcessChar now only updates cell data in memory; rendering is deferred
to FlipToScreen which batches consecutive same-color cells into single
TextOut calls (~5-10 per row instead of 80). Partial BitBlt transfers
only the dirty row band to the screen. Non-blinking rows render to one
buffer and BitBlt to the second, halving GDI work for typical content.
Also removes redundant GetCommError from KPComm receive path and adds
BeginUpdate/EndUpdate batching in the test app's CommEvent handler.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
VBX registration is non-functional in VB4 16-bit (VBRegisterModel is a
no-op, VBGetModelInfo never called). Native Delphi component avoids all
DLL/export/registration issues — compiles directly into the IDE.
TKPComm is a TComponent descendant calling the Windows 3.1 comm API
directly. Uses RegisterClass/CreateWindow for WM_COMMNOTIFY dispatch
with the component instance pointer stored in cbWndExtra. Includes a
test application (KPTEST) with send/receive UI built entirely in code.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
