如何将此VB代码转换为C#？

Private Declare Function GetWindowLong Lib "user32" Alias _
  "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long
Private Const GWL_STYLE = (-16)
Private Const WS_MAXIMIZEBOX = &H10000
dim lStyle as long

lStyle = GetWindowLong(Lhwnd, GWL_STYLE)
lStyle = lStyle And Not WS_MAXIMIZEBOX

In particular, how does one apply a negative to an int.

我想你坚持的线是最后一条线.代码似乎有点清楚.在C#中你可以这样做：

lStyle &= ~WS_MAXIMIZEBOX