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| Submitted on: 11/14/2001 3:14:27 AM
By: Mark van Renswoude
Level: Beginner
User Rating:
By 2 Users
Compatibility:Delphi 5, Delphi 4, Pre Delphi 4
Users have accessed this article 4693 times.
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| | | While looking at somebody else's code, I noticed he was doing all sorts of stuff with the MouseDown and MouseMove events. Here's a better way, it captures the WM_NCHITTEST message which Windows sends to make Windows think the user is clicking on the titlebar, thus moving the form...
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unit Unit1;
interface
uses
Windows,
Messages,
Forms;
type
TForm1 = class(TForm)
protected
procedure WMNCHitTest(var Msg: TWMNCHitTest); message WM_NCHITTEST;
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.WMNCHitTest(var Msg: TWMNCHitTest);
begin
// Call default procedure
inherited;
// Modify result to make windows think we're
// clicking on the titlebar when we're actually
// clicking on the client area...
if Msg.Result = HTCLIENT then
Msg.Result := HTCAPTION;
end;
end.
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Other 3 submission(s) by this author
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| Other User Comments |
11/20/2001 12:59:11 PM:Paul Harrison
What a wonderful explanation!
About
6 or 7 concepts are explained with 1
(oops, 2) lines of code.
Excellent
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8/5/2002 12:11:25 PM:Earl
Thank you. I was about to do that
MouseXXX thing too. This is MUCH
cleaner and simpler.
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10/17/2002 8:29:21 AM:Jason Myerscough
How could I make this code work when I
click an image? instead of the form?
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3/17/2003 4:45:54 PM:
How would i be able to test when a user
RIGHT clicks on the title bar only?
thus then displaying a POPUPMENU when
the user has done so?
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