VB Enumerated Types Vs Delphi Records

[mattlacey]

I'm writing a Delphi(5) app using calls to external DLLs. The sample code provided by the company who produced the DLLs is in VB and some of the calls to the procedures I need involve passing enumerated types as variables.

When trying to make these calls in Delphi I substituted the enumerated types with records, but it is not working.

The problem is not making the cals to the DLLs coz i can call other procedures fine.

Anyone got any ideas?
Does this make sense?

 

[sggaunt]

Is this because when you call the procedure you get an 'Enumerated Type expected' type of Error, or do you actualy know what the DLL procedures expect?

A Record need not be an enumerated Type, 'enumerated' just means numbered (whole numbers). I dont think this type of procedure will accept any 'Types' you define in your delphi code this may include records.

Someone may correct me here but I dont think you will be able to use anything other that Integer and/or PChar's as parameters for a DLL procedure written in another language. Arrays or Multidimensional arrays of these should be OK as well.

Steve.

 

[mattlacey]

The procedure was expecting expecting 3 parameters, the first a longinteger, the second a record containing 6 fields and the third a record containing 95! fields.

I have now got the call working, I think it may have been a memory allocation or a casting issue (It wasn't raising any error, just crashing out of the procedure.)

I have now added definitions for each field (including size in the case of strings) and it works OK. I just didn't want to define the different sizes for 101 strings.

Thanks for your suggestion Steve.

matt.