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7.8

API message handling

Asked by steve-west in Delphi.net Programming

Tags: message, handling, api

Converting Delphi 7 code to Delphi.Net and I'm having difficulty with API message handling. Take the following code:

procedure TPriamPageControl.WndProc(var Message:TMessage);

begin
    if Message.Msg = TCM_ADJUSTRECT then
    begin
        Inherited WndProc(Message);

        PRect(Message.LParam)^.Left := 0;
        PRect(Message.LParam)^.Right := ClientWidth;
        PRect(Message.LParam)^.Top := PRect(Message.LParam)^.Top-4;
        PRect(Message.LParam)^.Bottom := ClientHeight;
   
    end
    else
    begin
        Inherited WndProc(Message);
    end;
end;

// ---------------------------------------------------

What is the .NET equivalent of this?

Now I know LPARAM is a pointer to a TRect structure. But how on earth do I access it??? I've tried pointers, IntPtr, Integer but the compiler complains about them all. I thought I could pass it to a MessageCracker, but how do I use one of these?

This is something which is trivial in Delphi 7, but in .NET ..............?

Any help gratefully received

Thanks

Steve


 
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Zone: Delphi.net Programming
Tags: message, handling, api
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Solution Provided By: developmentguru
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Solution Grade: A
 
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