?
Solved

How to use VC structures and pointers in VB

Posted on 1999-01-28
3
Medium Priority
?
196 Views
Last Modified: 2010-05-03
Is there anyway in VB that you can define a String of Data (Buffer) and reference that data using a structure (Type) with a pointer?

VC Example:

struct EntryStruct
      {
      char szFldName [50];      
      int  nFldNumber;
      };


char szBuffer [500];
char szName   [100];      

EntryStruct* pPtr;
pPtr = (EntryStruct*) szBuffer;
szName = pPtr.szFldName;
0
Comment
Question by:JJONES
3 Comments
 
LVL 1

Expert Comment

by:mackagp
ID: 1471048
dunno if this helps, but you can define a fixed length string with
dim strxxx as string * 500

You can access any character in it by using

strxxy=mid(strxxx,position,1)


0
 
LVL 8

Expert Comment

by:MikeP090797
ID: 1471049
You can use RtlMoveMemory API to copy a struct into a buffer  directly, I think that will be the furthermost vb can do
Anyway, why are you asking, there might be a better way to achive what you want
0
 

Accepted Solution

by:
kuen earned 200 total points
ID: 1471050
Type EntryStruct
    szFldName(49) as Byte
    nFldNumber as Long
End Type

Dim pPtr as EntryStruct
Dim szName() As Byte
szName = pPtr.szFldName

No need to assign szBuffer, VB will do it.

0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

There are many ways to remove duplicate entries in an SQL or Access database. Most make you temporarily insert an ID field, make a temp table and copy data back and forth, and/or are slow. Here is an easy way in VB6 using ADO to remove duplicate row…
This article describes some techniques which will make your VBA or Visual Basic Classic code easier to understand and maintain, whether by you, your replacement, or another Experts-Exchange expert.
Get people started with the utilization of class modules. Class modules can be a powerful tool in Microsoft Access. They allow you to create self-contained objects that encapsulate functionality. They can easily hide the complexity of a process from…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…
Suggested Courses

580 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question