cant build

not sure how to fix

Severity Code Description Project File Line Suppression State Warning C4244 'initializing': conversion from 'LRESULT' to 'int', possible loss of data QuickClickLock C:\QuickClickLock\QuickClickLock\QuickClickLock.cpp 228 Warning C4312 'type cast': conversion from 'int' to 'PVOID' of greater size QuickClickLock C:\QuickClickLock\QuickClickLock\QuickClickLock.cpp 564 Warning C4715 'HotkeyControlProc': not all control paths return a value QuickClickLock C:\QuickClickLock\QuickClickLock\QuickClickLock.cpp 320 Warning C4715 'WindowProc': not all control paths return a value QuickClickLock C:\QuickClickLock\QuickClickLock\QuickClickLock.cpp 302 Error LNK2019 unresolved external symbol __imp_PlaySoundW referenced in function "void __cdecl PlayAudioNotif(int)" (?PlayAudioNotif@@YAXH@Z) QuickClickLock C:\QuickClickLock\QuickClickLock\QuickClickLock.obj 1