I know how to handle exceptions using Try .. catch kind what i actually do
push handler
push fs:[0]
.....
Once an exception occurs the debugger log file would throw Message=Access violation when writing to [00000001]
How do i throw another message to the debugger like "Function Calculate Started" using asm32 or Visual C++
so how can i talk to the debugger?
Sounds like you are really after WinAPI's OutputDebugString, olly will log this (so will any other debugger watching the global debug mutex), so will sysinternals dbgview.