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Converting External dlls from PB to C#
  1. How-to
  2.  C#
0 Votes
  1. Igor Perisic
  2. PowerScript Migrator
  3. Wednesday, 26 October 2022 05:38 PM UTC

Hi!

I am converting a few PowerBuilder apps to C# but I am not sure how to convert dlls from PowerBuilder to C#.

One of my dlls in PB is defined as FUNCTION longptr Decrypt(ref longptr decryptMem) LIBRARY "DecryptDLL.dll" alias for "Decrypt;Ansi"

I call this function in PB like so, LocalErrorCode = Decrypt(decryptMem), where decryptMem is a longptr and LocalErrorCode is an int.

 

And then in C# I have it defined as

[DllImport("DecryptDLL.dll")]
private static extern long Decrypt(ref long decryptMem);
 
When I call this function inside my C# app I get returned the wrong values.
I call it like so LocalErrorCode = (int)Decrypt(ref decryptMem); where decryptMem is a long and LocalErrorCode is an int. 
 
Inside PB: LocalErrorCode is 0 and decryptMem is 3062099201824. Which is what it should be
Inside C#: LocalErrorCode is -1105657857 and decryptMem is 2571579608608.
 
Not exactly sure where I am messing up, maybe I have variables defined as the wrong type. Does C# need to have a line like PB does for "alias for "Decrypt;Ansi""?
 
LDAP Authentication Via C# WebAPI Pb script ds object conversion
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