Question

API函数中的SetWindowPos函数的问题

看了好多API函数的使用方法，可以有好多的地方不明白，请高手出来指点一下，谢谢！
我的目的是利用API函数，使应用程序窗口永远在前，我的程序代码如下：

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
Private Const SWP_NOSIZE& = &H1 ＊＊＊＊
Private Const SWP_NOMOVE& = &H2 ＊＊＊＊
Private Const HWND_TOPMOST& = -1 ＊＊＊＊

Private Sub Form_Load()
SetWindowPos Form1.hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE
End Sub

上面这3句：
Private Const SWP_NOSIZE& = &H1 ＊＊＊＊
Private Const SWP_NOMOVE& = &H2 ＊＊＊＊
Private Const HWND_TOPMOST& = -1 ＊＊＊＊

到底是什么意思，请指点一下，谢谢！

Answer 1

Private Const SWP_NOSIZE& = &H1 ＊＊＊＊ 不改变窗体尺寸
Private Const SWP_NOMOVE& = &H2 ＊＊＊＊ 不改变窗体位置
Private Const HWND_TOPMOST& = -1 ＊＊＊＊ 设置窗体总在最前