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Add min/max buttons to a userform

VBA How To

Add min/max buttons to a userform

by  Nelviticus  Posted    (Edited  )
This was posted by [color blue]IvanMoala[/color] in response to a question in this thread: thread707-754928

It was so useful that I thought I'd put it in a FAQ.

The following code lets VBA access some Windows functions and defines a few constants. Put it at the top of your form's code module before all the functions and after the [color blue]
Code: 
Option Explicit
[/color] statement if you have one:

[color blue]
Code: 
Private Declare Function FindWindow _
    Lib "user32" _
        Alias "FindWindowA" ( _
            ByVal lpClassName As String, _
            ByVal lpWindowName As String) _
    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 DrawMenuBar _
    Lib "user32" ( _
        ByVal hWnd As Long) _
    As Long

Private Const GWL_STYLE As Long = (-16)
Private Const WS_SYSMENU As Long = &H80000
Private Const WS_MINIMIZEBOX As Long = &H20000
Private Const WS_MAXIMIZEBOX As Long = &H10000
[/color]

The following procedure adds the min and max buttons to your form when it activates. Add it to your form's code module (or add the code to your existing UserForm_Activate procedure if you have one):

[color blue]
Code: 
Private Sub UserForm_Activate()
    
    Dim Frmhdl As Long
    Dim lStyle As Long
    
    Frmhdl = FindWindow(vbNullString, Me.Caption)
    
    lStyle = GetWindowLong(Frmhdl, GWL_STYLE)
    lStyle = lStyle Or WS_SYSMENU
    lStyle = lStyle Or WS_MINIMIZEBOX
    lStyle = lStyle Or WS_MAXIMIZEBOX
    
    SetWindowLong Frmhdl, GWL_STYLE, (lStyle)
    DrawMenuBar Frmhdl
    
End Sub
[/color]

Thanks again to [color blue]IvanMoala[/color] for this.

Nelviticus
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