Export mmap's entry point under Windows (thanks, MarkH & Guido!).
diff --git a/PCbuild/mmap.dsp b/PCbuild/mmap.dsp
index 9d0798a..2aaec0b 100644
--- a/PCbuild/mmap.dsp
+++ b/PCbuild/mmap.dsp
@@ -54,7 +54,8 @@
 # ADD BSC32 /nologo

 LINK32=link.exe

 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /machine:I386

-# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /base:"0x1e1F0000" /dll /machine:I386 /out:"./mmap.pyd"

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /base:"0x1e1F0000" /dll /machine:I386 /out:"./mmap.pyd" /export:initmmap

+# SUBTRACT LINK32 /pdb:none

 

 !ELSEIF  "$(CFG)" == "mmap - Win32 Debug"

 

@@ -81,7 +82,8 @@
 # ADD BSC32 /nologo

 LINK32=link.exe

 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /pdbtype:sept

-# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /base:"0x1e1F0000" /dll /debug /machine:I386 /out:"./mmap_d.pyd" /pdbtype:sept

+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /base:"0x1e1F0000" /dll /debug /machine:I386 /out:"./mmap_d.pyd" /pdbtype:sept /export:initmmap

+# SUBTRACT LINK32 /pdb:none

 

 !ENDIF