🚀 go-pugleaf

Hi bar 
 
 bar says:
> Hello all
> One quick question
> 
> Is there any way to know, just before a form is moving.
> I need to perform some action before a form is moved from its last place.
> 
> Thanks
> SA 


in the class:

void __fastcall WMWindowPosChanging(TMessage& Msg);

BEGIN_MESSAGE_MAP
  MESSAGE_HANDLER(WM_WINDOWPOSCHANGING, TMessage, WMWindowPosChanging)
END_MESSAGE_MAP(TForm)

int the cpp file:

void __fastcall TForm1::WMWindowPosChanging(TMessage& Msg)
{
   TForm::Dispatch((void*)&Msg);

   LPWINDOWPOS LpWp = (LPWINDOWPOS)Msg.LParam;

   //LpWp->cx;
   //LpWp->cy;
}
//-------------------------------------------------------

or You can overide the SetBounds:
 
virtual void __fastcall SetBounds(int L, int T, int W, int H);

Kind regards
Asger

Hi Asger
Thanks i'll try

Regards
SA 

Hi asger

I used your code
But when the first time i am getting a exception

Can not change the Visible on OnShow and OnHide

Any idea how to handle this.
Regards
SA 

Hi bar 
 
 bar says:
> Hi asger
> 
> I used your code
> But when the first time i am getting a exception
> 
> Can not change the Visible on OnShow and OnHide
> 
> Any idea how to handle this.

It is very difficult to answer such a question without seing Your 
code so please show the code You are using. 
There is nothing in the code I wrote that gives that exception.

But if You are doing something with visible as responce to that
message You need to make sure that the form is finished creating.

You can set a bool in the form show event and then chek it in 
the message or You can check the ComponentState to make sure that
the form is created.
You can also check the Parent property if that is NULL don't 
do anything.

if You want to adjust the size or pos of the form You shuld chage 
the the values in the WINDOWPOS structure and not use the properties 
of the form.

Kind regards
Asger