Expression expected

Question

I write these four lines in my code and receive 'BC30201' expression expected error.How can I resolve this error please help.
the lines are:
Private Declare Function ch341opendevice Lib "ch341dll.dll" (ByVal iindex As Integer) As Integer

Sub main()
    Console.WriteLine(ch341opendevice(Byval iindex as integer) As Integer)
End Sub

Answer 1

Try something like this:

Console.WriteLine( ch341opendevice(0) )

Pass the correct parameter if 0 is not suitable.

Answer 2

Hi @kaveh rahimi ,
A parameter of method should be a specific value or variable, not a declaration of another method.
You need to pass the result of ‘ch341opendevice’ into ‘Console.WriteLine’ method.

    Sub Main()  
        Dim result As Integer = ch341opendevice(0)  
        Console.WriteLine(result)  
        Console.ReadLine()  
    End Sub  

Best Regards,
Xingyu Zhao
*
If the answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.