can we have data types for C structs and union in VB

Hi

I am having this structure in VC, can I have the same data type in VB, and how it will look like

Thanks

struct trevariant_struct {
short NullInd;
Long TreType;
union trevariant_datatype {
long VLong;
double VDouble;
char *VString;
TRE_BLOBVALUE VBlob;
struct trearray_struct {
long Size; /* Size of array */
TRE_VARIANT *Elements; /* Array of elements */
} VArray;
struct trehash_struct { /* All TRE_HASH types */
long Size; /* Number of values in hash */
TRE_HASHVALUE *Elements; /* Array of key value pairs in hash */
} VHash;
} Data;
};

Hi

You can use a Type declaration as a part of struct. Like...

Type <TypeName>

Members Declaration
Members Declaration
Members Declaration
-------
End Type

There's no concept of Unions in VB.


Gs

VB Code:

Private Type tVals
  Val as Long
  Loc as POINTAPI
End Type
 
Private Type tSys
  strName$  
  Vals() as tVals 'dynamic UDT array
End Type

Thanks for the response, so that means we cant map this data structure in VB ?

VB Code:

struct trevariant_struct {
 short NullInd;
 Long TreType;
 union trevariant_datatype {
                                       long VLong; 
                                       double VDouble; 
                                       char *VString; 
                                       TRE_BLOBVALUE VBlob; 
                                        } Data;
};

I used the VB Type but I wasn't able to pass it around the whole project for some reason. Instead I just made a class.

This is 2004 - forget structs - use a class :D

Quote:

---

Originally posted by Dave Sell
I used the VB Type but I wasn't able to pass it around the whole project for some reason ...

---

If you did not declare it as Public at the MODULE level then you obviously won't be able to ...

Yes it was Public - it just wouldnt pass around to all parts of the code when Passing as an argument ByVal.

Hi

I am not getting the meaning of replies, I have a dll for which source code is not available to me and it expects a struct as parameter which internally has union inside ( Data structure I have already posted), now is in VB is there any way to create a data structure like this C structure