Tons of changes to get this closer to being buildable from this directory;
still far away, but a lot closer than it was.
diff --git a/PC/VC6/winsound.dsp b/PC/VC6/winsound.dsp
index 04a9e59..1183606 100644
--- a/PC/VC6/winsound.dsp
+++ b/PC/VC6/winsound.dsp
@@ -44,7 +44,7 @@
 # PROP Target_Dir ""

 F90=df.exe

 # ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "WINSOUND_EXPORTS" /YX /FD /c

-# ADD CPP /nologo /MD /W3 /GX /O2 /I "..\Include" /I "..\PC" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "WINSOUND_EXPORTS" /YX /FD /c

+# ADD CPP /nologo /MD /W3 /GX /O2 /I "..\..\Include" /I ".." /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "WINSOUND_EXPORTS" /YX /FD /c

 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32

 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32

 # ADD BASE RSC /l 0xc09 /d "NDEBUG"

@@ -72,7 +72,7 @@
 # PROP Target_Dir ""

 F90=df.exe

 # ADD BASE CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "WINSOUND_EXPORTS" /YX /FD /GZ /c

-# ADD CPP /nologo /MDd /W3 /Gm /GX /Zi /Od /I "..\Include" /I "..\PC" /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "WINSOUND_EXPORTS" /YX /FD /GZ /c

+# ADD CPP /nologo /MDd /W3 /Gm /GX /Zi /Od /I "..\..\Include" /I ".." /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "WINSOUND_EXPORTS" /YX /FD /GZ /c

 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32

 # ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32

 # ADD BASE RSC /l 0xc09 /d "_DEBUG"

@@ -93,7 +93,7 @@
 # Name "winsound - Win32 Debug"

 # Begin Source File

 

-SOURCE=..\PC\winsound.c

+SOURCE=..\winsound.c

 # End Source File

 # End Target

 # End Project