Min/Max/Close

B

bossann

Is there a way to disable the Minimize/Maximize/Close buttons in Access? I'm
not talking about the ones for individual forms (since those can be set with
properties) but about the ones in the actual Access shell. This might not be
the proper place to ask this but I want to force people who are closing my
app to use the button on the main form (which triggers a series of SQL
statements to update table s that I use for tracking purposes), so the
question is rather form-related.

TIA,
bossann
 
M

Maurice

That would be against the users expectations. The user is used to working
with min, max and close buttons within windows. So my advice would be to
program against the closing of the database en trigger the SQL-actions then.
Even if you would get it done the user could use other options to get out of
the application without using you closebutton. Alt-F4, Ctrl-F4,
Ctrl-Alt-Del-> Task Manager etc... So make it easy on yourself and just tab
into the closing of the program and place your trigger there.
 
J

Jeanette Cunningham

A common way to make those sql statements run when the db closes is like
this:
Create a form that is opened in hidden mode when the db opens.
On the Unload Event for this hidden form, put those sql statements.
When users close the db, those sql statements will run just before the
hidden form closes.


Here are my notes on disabling the app close button.

Would you settle for disabling the application [X] button?

Take your pick based on version.

ACC: How to Disable the Close Button (X) on the Access
Application Window (95/97)
http://support.microsoft.com/?id=258049

ACC2000: How to Disable the Close Button (X) on the Access
Application Window
http://support.microsoft.com/?id=245746

ACC2002: How to Disable the Close Button (X) on the Access
Application Window and the Exit Command on the File Menu
http://support.microsoft.com/?id=300688

Alternatively, take a look here:

http://www.mvps.org/access/general/gen0005.htm

or here:

http://www.datapigtechnologies.com/flashfiles/preventcloseform.html

And some ready made code from MVP Terry Kreft:paste the following code into a module, then call it with
Call Buttons(false) To turn them off and

Call Buttons(True) to turn them on

' ********** Code Start *************
Option Explicit

Private Const GWL_STYLE = (-16)
Private Const WS_CAPTION = &HC00000
Private Const WS_MINIMIZEBOX = &H20000
Private Const WS_MAXIMIZEBOX = &H10000
Private Const WS_SYSMENU = &H80000

Private Const SWP_NOSIZE = &H1
Private Const SWP_NOMOVE = &H2
Private Const SWP_NOZORDER = &H4
Public Const SWP_FRAMECHANGED = &H20

Private Declare Function GetWindowLong _
Lib "user32" Alias "GetWindowLongA" ( _
ByVal hwnd As Long, _
ByVal nIndex As Long _
) As Long

Private Declare Function SetWindowLong _
Lib "user32" Alias "SetWindowLongA" ( _
ByVal hwnd As Long, _
ByVal nIndex As Long, _
ByVal dwNewLong As Long _
) As Long

Private Declare Function SetWindowPos _
Lib "user32" ( _
ByVal hwnd As Long, _
ByVal hWndInsertAfter As Long, _
ByVal X As Long, _
ByVal Y As Long, _
ByVal cx As Long, _
ByVal cy As Long, _
ByVal wFlags As Long _
) As Long
' *************************************

Function AccessTitleBar(Show As Boolean) As Long
Dim hwnd As Long
Dim nIndex As Long
Dim dwNewLong As Long
Dim dwLong As Long
Dim wFlags As Long

hwnd = hWndAccessApp
nIndex = GWL_STYLE
wFlags = SWP_NOSIZE + SWP_NOZORDER + SWP_FRAMECHANGED + SWP_NOMOVE

dwLong = GetWindowLong(hwnd, nIndex)

If Show Then
dwNewLong = (dwLong Or WS_CAPTION)
Else
dwNewLong = (dwLong And Not WS_CAPTION)
End If

Call SetWindowLong(hwnd, nIndex, dwNewLong)
Call SetWindowPos(hwnd, 0&, 0&, 0&, 0&, 0&, wFlags)
End Function

Function Buttons(Show As Boolean) As Long
Dim hwnd As Long
Dim nIndex As Long
Dim dwNewLong As Long
Dim dwLong As Long

hwnd = hWndAccessApp
nIndex = GWL_STYLE

Const wFlags = SWP_NOSIZE + SWP_NOZORDER + SWP_FRAMECHANGED + SWP_NOMOVE
Const FLAGS_COMBI = WS_MINIMIZEBOX Or WS_MAXIMIZEBOX Or WS_SYSMENU

dwLong = GetWindowLong(hwnd, nIndex)

If Show Then
dwNewLong = (dwLong Or FLAGS_COMBI)
Else
dwNewLong = (dwLong And Not FLAGS_COMBI)
End If

Call SetWindowLong(hwnd, nIndex, dwNewLong)
Call SetWindowPos(hwnd, 0&, 0&, 0&, 0&, 0&, wFlags)
End Function
' ********** Code End *************

-- Terry Kreft MVP Microsoft Access >>>>>>

-- Jeff Conrad Access Junkie

This is interesting. I've only used the instructions in the 97 article
before.
The 97 instructions work for 97, 2000, 2002, and 2003 by the way.
Anyway, I found it interesting that the 2002 article has additional
instructions
for allowing the user to toggle the close button through a form.

What step 6 is showing you is a way to toggle the enabled status of the
application close button. A back door so to speak. What I have done
is always set up an AutoExec macro to automatically turn it off without
user intervention. Just my choice.

So here is what you do.
Just create a new blank small form and put two command buttons on it.
Name them cmdEnable and cmdDisable.
In the Click event for cmdEnable enter this code into the code window:

Private Sub cmdEnable_Click()
Call SetEnabledState(True)
End Sub

In the Click event for cmdDisable enter this code into the code window:

Private Sub cmdDisable_Click()
Call SetEnabledState(False)
End Sub

Make any other formatting changes you wish to the form. Now it is
your decision whether you want to actually have the other users be
able to use this form. If not, do not show it to them and make a sneaky
way for you to open it. Clicking the two buttons will toggle the enabled
state of the application close button.

If you would like to disable the close button automatically when the
database opens just follow these steps:
1. Create a new macro
2. In the Action column enter RunCode
3. In the Function Name area in the bottom left corner enter this:

SetEnabledState(False)

4. Save and close the macro. You *must* name this macro
AutoExec.

5. It is ****essential**** you have a command button somewhere
on your main form that not only closes the application, but Access
as well. Something like DoCmd.Quit.

6. Close the database and then reopen. You will notice that the
close button is disabled and the Exit option on the File Menu.

-- Jeff Conrad Access Junkie


Jeanette Cunningham
 
G

George Nicholson

At the top of a general code module (or the Main form code module):
Public gOKtoClose as Boolean

within Form_Load:
' This is actually redundant since its the default, but included for
clarity
gOKtoClose = False

within Form_Unload:
' Cancel unless user clicked the "Close App" button
' This prevents this form from being closed by any method other than
clicking cmdExitApp
' (Except for Ctrl-Alt-Del, powering off computer or computer crashing)
If gOKtoClose Eqv False Then
MsgBox "You must use the 'Exit App' button to Exit the
Application.", vbOKOnly, "Can't Exit"
Cancel = True
End If

within cmdExitApp_Click:
Call RoutineThatRunsSQLStatements
gOKtoClose = True 'Required by Form_Unload in order to close
DoCmd.Close acForm, Me.Name, acSaveNo
DoCmd.Quit acQuitSaveNone
 

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