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CreateFileMapping parameter

I follow the sample code from MSDN as shown below.

h = CreateFileMapping(-1,pNull,PAGE_READWRITE,0, 65535,"MyShare")

The problem I am having is that I can't find where the constant pNull and PAGE_READWRITE are defined. I tried to replace pNull with vbNull, Null, 0, and 0& and I get type mismatch error. How can I create a handle by using CreateFileMapping.  Please help
1 Solution
Change the declare statement as follow:

Private Declare Function CreateFileMapping Lib "kernel32" Alias "CreateFileMappingA" (ByVal hFile As Long, ByVal lpFileMappigAttributes As long, ByVal flProtect As Long, ByVal dwMaximumSizeHigh As Long, ByVal dwMaximumSizeLow As Long, ByVal lpName As String) As Long
private const PAGE_READONLY=2
private const PAGE_READWRITE=4
private const PAGE_WRITECOPY=8

and then:

h = CreateFileMapping(&hFFFFFFFF,0,PAGE_READWRITE,0, 65535,"MyShare")

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