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Disable Max button on MDI form

Posted on 1998-11-04
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Last Modified: 2008-02-01
How I can disabled Max button on MDI parent form?
Than user can't resize MDI form,will be always MAXIMIZE.
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Question by:igorshul
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5 Comments
 
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Expert Comment

by:dabellei
ID: 1443149
Wich version of VB
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LVL 3

Expert Comment

by:fguerreiro_inix
ID: 1443150
As far as I know there is no way to turn off the Max button on the parent MDIform.  Now you can turn off the max button on a MDIChild form.   The reason for this is  that it is possible to have form that are larger than the MDIform.  The max box allows you to see everything.  Give me an Idea of what you are trying to do and maybe I can be of more help

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Author Comment

by:igorshul
ID: 1443151
I'am using VB 5.0.
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Author Comment

by:igorshul
ID: 1443152
I trying to make MDI Form always Maximize.
I belive there some API calls to make this button disabled or unvisible... All my Child form will be maximize also except some windows very small.When user make MDI Normal My Child form
not going to fit into it...
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Accepted Solution

by:
mwiebe earned 50 total points
ID: 1443153
You can use a couple of API calls for this.

First you need to Declare the API functions:

Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (Byval hWnd as  Long,  Byval nIndex as Long) as Long

Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (Byval hWnd as  Long,  Byval nIndex as Long, ByVal NewLong as Long) as Long

Public Const GWL_STYLE = (-16)

Then in the load event of the MDIform declare a long, such as
Dim MyLong&, MyTemp&

and make the following calls

MyLong = GetWindowLong (me.hwnd,GWL_STYLE) 'This gets the window style bits
MyLong=myLong and Not (&H10000) 'this disables the max button
MyTemp= SetWindowLong (me.hwnd,GWL_STYLE),MyLong)'put the style bits back

I have used this - the Max Button is still shown, but as disabled.

Hope this helps.
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