Build Error PLEASE HELP!

1>------ Build started: Project: D3DV1, Configuration: Debug Win32 ------
1>  deadhellmenu.cpp
1>c:\users\ukgc\documents\visual studio 2010\projects\d3d v1\d3dv1\deadhellmenu.cpp(1): fatal error C1083: Cannot open include file: 'stdafx.h': No such file or directory
1>  deadhellsound.cpp
1>  Building  : DeadHell D3D Menu
1>c:\users\ukgc\desktop\d3d folder\deadhellsound.cpp(8): error C2664: 'sndPlaySoundW' : cannot convert parameter 1 from 'LPCSTR' to 'LPCWSTR'
1>          Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>c:\users\ukgc\desktop\d3d folder\deadhellsound.cpp(12): error C2664: 'sndPlaySoundW' : cannot convert parameter 1 from 'LPCSTR' to 'LPCWSTR'
1>          Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>  deadhellfont.cpp
1>c:\users\ukgc\desktop\d3d folder\deadhellfont.cpp(51): error C2664: 'strcpy' : cannot convert parameter 1 from 'TCHAR [80]' to 'char *'
1>          Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>  deadhellbase.cpp
1>  Building  : DeadHell D3D Menu
1>c:\users\ukgc\desktop\d3d folder\deadhelldetour.h(49): error C2664: 'GetModuleHandleW' : cannot convert parameter 1 from 'LPCSTR' to 'LPCWSTR'
1>          Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>c:\users\ukgc\desktop\d3d folder\deadhellbase.cpp(316): error C2664: 'CreateWindowExW' : cannot convert parameter 3 from 'const char [1]' to 'LPCWSTR'
1>          Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>c:\users\ukgc\desktop\d3d folder\deadhellbase.cpp(347): error C2664: 'GetModuleHandleW' : cannot convert parameter 1 from 'const char [9]' to 'LPCWSTR'
1>          Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>  Generating Code...
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========