OS Win98SE
BorlandC++Builder5
Hello, digital oscilloscope is connected via null modem cable to PC serial port.
Serial port is opened with CreateFile and handle is got, but i cant read answer or write commands to oscilloscope.
I get SystemError 6 = invalide handle. Although in another functions (SetCommMask for example) this handle is true.
1) Do i need second handle to oscilloscope?
2)I need ideas how such comunication must go on?
Oscilloscope has owne driver – TekVISA.
But i have linking errors – unresolved external viOpenDefaultRM for all functions in it (Include and Library paths are included ).
Thanks for all advices, references, ideas.
