I am new to Win32 API programming in Visual Basic and I need help with a specific call. This is the GetWindowPlacement call:

Declare Function GetWindowPlacement Lib "user32" Alias "GetWindowPlacement" (ByVal hwnd As Long, lpwndpl As WINDOWPLACEMENT) As Long

I already understand that I must place in the first argument (target window's handle), but I have no idea what I must put in the second argument. I do know that I must define the WINDOWPLACEMENT type, but I am not sure at all as what to place in the 2nd argument field when calling. Please respond and enlighten me as to what to do. HELP!