' API declarations
Private Const GWL_STYLE = (-16)
Private Const WS_SYSMENU = &H80000
Private Const WS_CAPTION = &HC00000
Private Const WS_THICKFRAME = &H40000
Private Const WS_MAXIMIZEBOX = &H10000
Private Const WS_MINIMIZEBOX = &H20000
Private Const SC_Close As Long = &HF060&
Private Const SC_MAXIMIZE = &HF030&
Private Const SC_MINIMIZE = &HF020&
Private Const MIIM_STATE As Long = &H1&
Private Const MIIM_ID As Long = &H2&
Private Const MFS_GRAYED As Long = &H3&
Private Const WM_NCACTIVATE As Long = &H86
Private Type MENUITEMINFO
cbSize As Long
fMask As Long
fType As Long
fState As Long
wID As Long
hSubMenu As Long
hbmpChecked As Long
hbmpUnchecked As Long
dwItemData As Long
dwTypeData As String
cch As Long
End Type
Private Declare Function GetSystemMenu Lib "user32" (ByVal hwnd As Long, ByVal bRevert As Long) As Long
Private Declare Function GetMenuItemInfo Lib "user32" Alias "GetMenuItemInfoA" (ByVal hMenu As Long, ByVal un As Long, ByVal b As Boolean, lpMenuItemInfo As MENUITEMINFO) As Long
Private Declare Function SetMenuItemInfo Lib "user32" Alias "SetMenuItemInfoA" (ByVal hMenu As Long, ByVal un As Long, ByVal bool As Boolean, lpcMenuItemInfo As MENUITEMINFO) As Long
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 SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Public Sub DisableFormResize(Frm As Form)
'init
Dim style As Long
Dim hMenu As Long
Dim MII As MENUITEMINFO
Dim lngMenuID As Long
Const xSC_MAXIMIZE As Long = -11
'set window style to disable form resize
style = GetWindowLong(Frm.hwnd, GWL_STYLE)
style = style And Not WS_THICKFRAME
style = style And Not WS_MAXIMIZEBOX
'apply new window style to form
style = SetWindowLong(Frm.hwnd, GWL_STYLE, style)
'disable form's `maximize` button
On Error Resume Next
' Retrieve a handle to the system menu
hMenu = GetSystemMenu(Frm.hwnd, 0)
' Retrieve the menu item information for the maximize menu item/button
With MII
.cbSize = Len(MII)
.dwTypeData = String(80, 0)
.cch = Len(.dwTypeData)
.fMask = MIIM_STATE
.wID = SC_MAXIMIZE
End With
If GetMenuItemInfo(hMenu, MII.wID, False, MII) = 0 Then Exit Sub
' Switch the ID of the menu item so that VB can not undo the action itself
With MII
lngMenuID = .wID
.wID = xSC_MAXIMIZE
.fMask = MIIM_ID
End With
If SetMenuItemInfo(hMenu, lngMenuID, False, MII) = 0 Then Exit Sub
' Set the enabled / disabled state of the menu item
With MII
.fState = (.fState Or MFS_GRAYED)
.fMask = MIIM_STATE
End With
If SetMenuItemInfo(hMenu, MII.wID, False, MII) = 0 Then Exit Sub
' Activate the non-client area of the window to update the titlebar, and
' draw the close button in its new state.
SendMessage Frm.hwnd, WM_NCACTIVATE, True, 0
' this is to refresh the form
Frm.Width = Frm.Width - 1
Frm.Width = Frm.Width + 1
End Sub
Private Sub Form_Load()
Call DisableFormResize(Me)
End Sub
ضع هذا الكود في Module مستقل لوحده
كود :
Option Explicit
' API declarations
Private Const GWL_STYLE = (-16)
Private Const WS_SYSMENU = &H80000
Private Const WS_CAPTION = &HC00000
Private Const WS_THICKFRAME = &H40000
Private Const WS_MAXIMIZEBOX = &H10000
Private Const WS_MINIMIZEBOX = &H20000
Private Const SC_Close As Long = &HF060&
Private Const SC_MAXIMIZE = &HF030&
Private Const SC_MINIMIZE = &HF020&
Private Const MIIM_STATE As Long = &H1&
Private Const MIIM_ID As Long = &H2&
Private Const MFS_GRAYED As Long = &H3&
Private Const WM_NCACTIVATE As Long = &H86
Private Type MENUITEMINFO
cbSize As Long
fMask As Long
fType As Long
fState As Long
wID As Long
hSubMenu As Long
hbmpChecked As Long
hbmpUnchecked As Long
dwItemData As Long
dwTypeData As String
cch As Long
End Type
Private Declare Function GetSystemMenu Lib "user32" (ByVal hwnd As Long, ByVal bRevert As Long) As Long
Private Declare Function GetMenuItemInfo Lib "user32" Alias "GetMenuItemInfoA" (ByVal hMenu As Long, ByVal un As Long, ByVal b As Boolean, lpMenuItemInfo As MENUITEMINFO) As Long
Private Declare Function SetMenuItemInfo Lib "user32" Alias "SetMenuItemInfoA" (ByVal hMenu As Long, ByVal un As Long, ByVal bool As Boolean, lpcMenuItemInfo As MENUITEMINFO) As Long
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 SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Public Sub DisableFormResize(Frm As Form)
'init
Dim style As Long
Dim hMenu As Long
Dim MII As MENUITEMINFO
Dim lngMenuID As Long
Const xSC_MAXIMIZE As Long = -11
'set window style to disable form resize
style = GetWindowLong(Frm.hwnd, GWL_STYLE)
style = style And Not WS_THICKFRAME
style = style And Not WS_MAXIMIZEBOX
'apply new window style to form
style = SetWindowLong(Frm.hwnd, GWL_STYLE, style)
'disable form's `maximize` button
On Error Resume Next
' Retrieve a handle to the system menu
hMenu = GetSystemMenu(Frm.hwnd, 0)
' Retrieve the menu item information for the maximize menu item/button
With MII
.cbSize = Len(MII)
.dwTypeData = String(80, 0)
.cch = Len(.dwTypeData)
.fMask = MIIM_STATE
.wID = SC_MAXIMIZE
End With
If GetMenuItemInfo(hMenu, MII.wID, False, MII) = 0 Then Exit Sub
' Switch the ID of the menu item so that VB can not undo the action itself
With MII
lngMenuID = .wID
.wID = xSC_MAXIMIZE
.fMask = MIIM_ID
End With
If SetMenuItemInfo(hMenu, lngMenuID, False, MII) = 0 Then Exit Sub
' Set the enabled / disabled state of the menu item
With MII
.fState = (.fState Or MFS_GRAYED)
.fMask = MIIM_STATE
End With
If SetMenuItemInfo(hMenu, MII.wID, False, MII) = 0 Then Exit Sub
' Activate the non-client area of the window to update the titlebar, and
' draw the close button in its new state.
SendMessage Frm.hwnd, WM_NCACTIVATE, True, 0
' this is to refresh the form
Frm.Width = Frm.Width - 1
Frm.Width = Frm.Width + 1
End Sub
