How do I detect if a Form or Windows has moved position ?

I have two forms, a menu and a mainform which displays multiple forms within it.

If I move the Mainform, I want the Menu Form to move as well.

How Do I detect if the MainForm has moved, which event would I use ?

Hopefully this one's easy,

Thanks in advance.

pjelias
pjeliasAsked:
Who is Participating?
 
jeurkCommented:
Maybe it's not what you want to do becasue maybe you don't have access to the form you want to snoop...
But if what you want to do is make your menu form follow the movement of your main form, the you just do it like that:
in your main form, add
  private
      procedure WMWINDOWPOSCHANGING
            (Var Msg: TWMWINDOWPOSCHANGING);
             message WM_WINDOWPOSCHANGING;

and implement it like that:
procedure TForm3.WMWINDOWPOSCHANGING(var Msg: TWMWINDOWPOSCHANGING);
begin
  if Assigned(MenuForm) then MenuForm.SetBounds(Left+Width,Top,Width,Height);
end;

You can use the values you want in setbounds, I mean choose them ;)
You don't need to touch to the menu form...

this is also working with     procedure MoveForm(var Message: TMessage); message WM_MOVE;

The difference I think is that WMWINDOWPOSCHANGING gets the event before the form is moving...

by itself, Meikl's answer was correct, but a sample would have helped...
Let me know if this works and if this is what you wanted...

john.
0
 
kretzschmarCommented:
0
 
jeurkCommented:
Hi,
I suggest you use
      procedure WMWINDOWPOSCHANGING
            (Var Msg: TWMWINDOWPOSCHANGING);
             message WM_WINDOWPOSCHANGING;

that is even more precise...
John.
0
Cloud Class® Course: C++ 11 Fundamentals

This course will introduce you to C++ 11 and teach you about syntax fundamentals.

 
pjeliasAuthor Commented:
John,

when / how do you use the above procedure ?

Could you provide some sample code ?

Thanks
0
 
pjeliasAuthor Commented:
John,

I want to be able to detect if a window/form has been moved via dragging the window with a mouse.

Therefore where/how would I use the procedure ?

The help is on WM_WINDOWPOSCHANGING is not very useful.

ps. I am using Delphi 6.
0
 
pjeliasAuthor Commented:
Perfect,

the WM_MOVE was used as it is used after Window has Moved,WMWINDOWPOSCHANGING works before WIndows has moved, implemented in code and all works well.

Thanks
0
 
jeurkCommented:
Great,
See you in another thread.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.