Solved

How to deal with VB ByRef in Delphi

Posted on 2004-08-02
2
645 Views
Last Modified: 2010-04-05
I am in the process of converting a VB program to Delphi. There are many calls to an external DLL that need to be made. One of these functions is:

Declare Function rtdGetParams Lib "rtdsdk.dll" (ByVal nBoardNum As Integer, ByVal nParamNum As Integer, ByRef lpParamVal As Long) As Integer

And its' use in the VB program is:

    If (rtdGetParams(0, CURRENT_POSITION, lpCurrPos) = VP_BS_ERROR) Then
        IDC_TIMER.Enabled = False
        MsgBox "rtdGetParams(CURRENT_POSITION) Failure", vbIconStop, "Error Report"
        nBoardState = VP_BS_ERROR
        IDC_TIMER.Enabled = False
    Else
        IDC_SCROLLBAR_CURRENT_FRAME.Value = lpCurrPos
    End If

The question is: How do I convert the first line to work with Delphi?

Tom
0
Comment
Question by:flight5132003
2 Comments
 
LVL 27

Accepted Solution

by:
kretzschmar earned 250 total points
ID: 11694795
guess

Function rtdGetParams(nBoardNum : Integer; nParamNum : Integer, var lpParamVal : Integer) : Integer;
begin....

meikl ;-)

0
 

Author Comment

by:flight5132003
ID: 11694832
Thanks Meikl!

Worked like a charm!
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
System restore point 4 91
Delphi application Soap connection 5 96
Create a path if not exists 7 69
Dynamically Created Query 3 50
A lot of questions regard threads in Delphi.   One of the more specific questions is how to show progress of the thread.   Updating a progressbar from inside a thread is a mistake. A solution to this would be to send a synchronized message to the…
The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
A short film showing how OnPage and Connectwise integration works.

914 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

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now