API function to remove min button in MDIform

[Megatron]

Try this:

Private Declare Function RemoveMenu Lib "user32" (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long) As Long
Private Declare Function GetSystemMenu Lib "user32" (ByVal hwnd As Long, ByVal bRevert As Long) As Long
Private Const MF_BYPOSITION = &H400&
 
Private Sub Form_Load()
    'Remove sizing
    Call RemoveMenu(GetSystemMenu(hwnd, 0), 2, MF_BYPOSITION)
    'Remove minimizing
    Call RemoveMenu(GetSystemMenu(hwnd, 0), 2, MF_BYPOSITION)
End Sub