I Create 5 functions but undeclare variable

[youssef]

Hi,

I would like to create 5 functions :

- SERIALPORT_OPEN (I use hPort = CreateFile);
- SERIALPORT_CLOSE (I use CloseHandle(hPort));
- SERIALPORT_READDATA(I use ReadFile(hPort));
- SERIALPORT_WRITEDATA(I use WriteFile(hPort));

But when I compile the 5 functions, I have a problem.
The compile say that the hport is undeclared.

How can I do to use my functions ?

 

[joeGrammar]

Sounds like you're missing a library or header file

 

[youssef]

The problem is :

I use HANDLE hPort and I declare it in SERIALPORT_OPEN function.
But when I compile the other functions say hPort undeclared.

 

[joeGrammar]

Well if you declare it within a function, it won't be able to be accessed by other functions. Its scope would only be the one function

 

[youssef]

but how can I do ?

May be declare it as a public variable in my class.

 

[joeGrammar]

yea, that would work

 

[joeGrammar]

It also doesn't have to be public if its only used within the class. A private variable can be accessed by all members in a class