can i open same com port(eg:com1) in both two class

[vc programmer 0]

i use serial communication both two class. first,i open com port from one class for receiving data and displaying data in the dialog. and i receive data from com. this is fine work.. samelly,i open com port from another class in my application for displaying another format in another dialog. in case, i have problems. it doesn't work. i have not receive data from com port. i want to know can i open same com port(eg:com1) in both two class within one application?

[Cedric Moonen]

No, you can only open a COM port once. So, you'll need to share the handle of the port to be able to read/write data from another class