Why won't my form shrink down to a smaller size?

Here is the code:

private void InitializeComponent()
{
//
// Form1
//
this.AutoScaleBaseSize = new
System.Drawing.Size(200, 200);
this.ClientSize = new
System.Drawing.Size(200, 200);
this.ControlBox = false;
this.FormBorderStyle =
System.Windows.Forms.FormBorderStyle.FixedSingle;
this.Location = new
System.Drawing.Point(10, 10);
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "Form1";
this.StartPosition =
System.Windows.Forms.FormStartPosition.Manual;

}





protected override void OnMouseDown
(MouseEventArgs e)
{
System.Drawing.Size x;
x = this.ClientSize;
x = this.Size;

this.Height = 5;
this.Width = 300;

x = this.ClientSize;
x = this.Size;

base.OnMouseDown (e);
}

..

Hi,

Windows sends the WM_GETMINMAXINFO message to your window when the size is
about to change. By implementing your own window procedure and handling this
message you can change the minimum dimensions allowed.

For more information please see the following document:

WM_GETMINMAXINFO Notification
http://msdn.microsoft.com/library/en...MINMAXINFO.asp

Regards,

Gabriele

Isn't there a C# method for doing this?

Thanks


>-----Original Message-----
>Hi,
>
>Windows sends the WM_GETMINMAXINFO message to your
window when the size is
>about to change. By implementing your own window
procedure and handling this
>message you can change the minimum dimensions allowed.
>
>For more information please see the following document:
>
>WM_GETMINMAXINFO Notification
>http://msdn.microsoft.com/library/en-
us/winui/WinUI/WindowsUserInterface/Windowing/Windows/Wind
owReference/WindowMessages/WM_GETMINMAXINFO.asp
>
>Regards,
>
> Gabriele
>
>
>.
>

Not that I know.

Your code works fine for me. When I click on the form, it resizes as
expected.

This thread is a bit confusing to me, since one responder seemed to think
you were asking about setting the minimum size for a form. You do not need
to handle the window message to do this. As you might expect, you can just
set the MinimumSize and MaximumSize properties on the form.

Tom Clement
Apptero, Inc.


"Me" <(E-Mail Removed)> wrote in message
news:098f01c3ba72$089c3980$(E-Mail Removed)...
> Why won't my form shrink down to a smaller size?
>
> Here is the code:
>
> private void InitializeComponent()
> {
> //
> // Form1
> //
> this.AutoScaleBaseSize = new
> System.Drawing.Size(200, 200);
> this.ClientSize = new
> System.Drawing.Size(200, 200);
> this.ControlBox = false;
> this.FormBorderStyle =
> System.Windows.Forms.FormBorderStyle.FixedSingle;
> this.Location = new
> System.Drawing.Point(10, 10);
> this.MaximizeBox = false;
> this.MinimizeBox = false;
> this.Name = "Form1";
> this.StartPosition =
> System.Windows.Forms.FormStartPosition.Manual;
>
> }
>
>
>
>
>
> protected override void OnMouseDown
> (MouseEventArgs e)
> {
> System.Drawing.Size x;
> x = this.ClientSize;
> x = this.Size;
>
> this.Height = 5;
> this.Width = 300;
>
> x = this.ClientSize;
> x = this.Size;
>
> base.OnMouseDown (e);
> }
>
> .
>
>

Tom,

MinimumSize and MaximumSize work fine, but they don't allow you to shrink
the window less than the size of the caption. I believe this is what he was
looking for.

Gabriele

Gabriele,
Ah, I see. That's good to know.

From the code he provided, it appears that the form is
BorderStyle.FixedSingle, which does not have a caption, so I'm not sure what
the problem is. I did run his code and it changed the form size as he
seemed to expect.

Tom


"Gabriele G. Ponti" <ggponti.at.hotmail.com> wrote in message
news:OO$(E-Mail Removed)...
> Tom,
>
> MinimumSize and MaximumSize work fine, but they don't allow you to shrink
> the window less than the size of the caption. I believe this is what he
was
> looking for.
>
> Gabriele
>
>

So... if you cannot size the form smaller than
the size of the caption... is there a form that I can use
that does not have this restriction?

I have done the WM_GETMINMAXINFO "work around" and wierd
stuff starts happening to the form when you shrink it
really small for example: you can only size "up" some
times and other times you can only size "down".

With a Win32 window you can make it any size you desire,
without restrictions... is a form an analogous entity as
a window ?

Thanks
Me

>-----Original Message-----
>Gabriele,
>Ah, I see. That's good to know.
>
>From the code he provided, it appears that the form is
>BorderStyle.FixedSingle, which does not have a caption,
so I'm not sure what
>the problem is. I did run his code and it changed the
form size as he
>seemed to expect.
>
>Tom
>
>
>"Gabriele G. Ponti" <ggponti.at.hotmail.com> wrote in
message
>news:OO$(E-Mail Removed)...
>> Tom,
>>
>> MinimumSize and MaximumSize work fine, but they don't
allow you to shrink
>> the window less than the size of the caption. I
believe this is what he
>was
>> looking for.
>>
>> Gabriele
>>
>>
>
>
>.
>

The form shrunk down to 5 pixels in size ?

Me

>-----Original Message-----
>Gabriele,
>Ah, I see. That's good to know.
>
>From the code he provided, it appears that the form is
>BorderStyle.FixedSingle, which does not have a caption,
so I'm not sure what
>the problem is. I did run his code and it changed the
form size as he
>seemed to expect.
>
>Tom
>
>
>"Gabriele G. Ponti" <ggponti.at.hotmail.com> wrote in
message
>news:OO$(E-Mail Removed)...
>> Tom,
>>
>> MinimumSize and MaximumSize work fine, but they don't
allow you to shrink
>> the window less than the size of the caption. I
believe this is what he
>was
>> looking for.
>>
>> Gabriele
>>
>>
>
>
>.
>

Ok... here is what I have done....


Near the top of my Form:

using System.Runtime.InteropServices; // Marshal

//Declare wrapper managed POINT class.
[ StructLayout (LayoutKind.Sequential) ]
public class POINT
{
public int x;
public int y;
}


//Declare wrapper managed MouseHookStruct
class.
[ StructLayout(LayoutKind.Sequential)]
public class MinMaxInfoStruct
{
public POINT ptReserved;
public POINT ptMaxSize;
public POINT ptMaxPosition;
public POINT ptMinTrackSize;
public POINT ptMaxTrackSize;
}








Inside the form class:


const int WM_GETMINMAXINFO = 0x0024;

protected override void WndProc(ref Message m)
{
if( m.Msg == WM_GETMINMAXINFO )
{
MinMaxInfoStruct info = (MinMaxInfoStruct)
Marshal.PtrToStructure(m.LParam,
typeof(MinMaxInfoStruct));

info.ptMinTrackSize.y = 2;
Trace.WriteLine( "Y after assignment ",
info.ptMinTrackSize.y.ToString() );

int y = info.ptMinTrackSize.y;
Trace.WriteLine( "Y from 'struct' ", y.ToString() );

Marshal.StructureToPtr( info, m.LParam, false );
}

base.WndProc (ref m);
}



Again the mouse routine:

protected override void OnMouseDown(MouseEventArgs e)
{
Trace.WriteLine( "mouse down" );
System.Drawing.Size x;
x = this.ClientSize;
x = this.Size;

this.Size = new System.Drawing.Size( 400, 1 );

x = this.ClientSize;
x = this.Size;
Trace.WriteLine( "size ", this.Size.ToString() );

base.OnMouseDown (e);
}


Trace output:

2: Y after assignment
2: Y from 'struct'
mouse down
2: Y after assignment
2: Y from 'struct'
{Width=318, Height=38}: size



What gives?????

Thanks
Me