Real Software Forums

Hi,

I have an external method that gets a string pointer as an input parameter, like below:


When I call this method, if my Cstring variable (in this case "strName ") has less than 140 characters and does not contain a new line character then
appears as empty in the external method.

If the strName variable has more than 140 characters and also contains a new line character, then everything works just fine.

Anyone can explain this please?
Any help is appreciated!!!!

Real Studio 2011, Release 4, on Windows 7.

Hi,

I have an external method (created with PowerBasic) that gets a string pointer as an input parameter, like below:


When I call this method, if my Cstring variable (in this case "strName ") has less than 140 characters and does not contain a new line character then
appears as empty in the external method.

If the strName variable has more than 140 characters and also contains a new line character, then everything works just fine.

Anyone can explain this please?
Any help is appreciated!!!!

Real Studio 2011, Release 4, on Windows 7.[/quote]

How is the parameter defined in the dll? char **? I presume you're passing a Memoryblock to the declare.

Thanks for your response timhare.

In the PowerBasic method, the parameter is defined as "STRING POINTER" which is equivalent to char **.
In the RealBasic method, I'm calling the PB method using the string's pointer (use ByRef).

I tried to use memoryBlock but it didn't work at all.

Declare it

(strname as Ptr)

and pass it a memoryblock.

Thank you very much timhare. It worked!!!!!
Actually I also had to change the string type in declaration of the PB method from STRING to STRINGZ (anyway this is PB).
But since I knew from your post what was the correct declaration in RB, I tried various declarations in the external method until it worked.