I use Delphi XE on WinXP-SP3 with CPort ver.4.11f (the latest).
my application is working fine under windows xp 32 bit and windows 7 32 bit.
but on windows 7 64 bit when trying to opening the com port it raise error "setupcomm function failed (Error : 1)"
UAC is disabled.
when debugging it stops in Cport.pas in procedure TCustomComPort.ApplyBuffer on line "if not SetupComm(FHandle, FBuffer.InputSize, FBuffer.OutputSize) then"
can some one suggest any solution to this problem