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How to deal with VB ByRef in Delphi

Posted on 2004-08-02
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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
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Question by:flight5132003
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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 ;-)

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Author Comment

by:flight5132003
ID: 11694832
Thanks Meikl!

Worked like a charm!
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